{
    "cdp_num": null,
    "comment": "The antenna is installed on a\nconcrete pillar on the roof of the\nTechnical University of Civil\nEngineering, Faculty of Geodesy,\n26 m above the ground.",
    "conditions": [],
    "country": "Romania",
    "country_code_ISO": "ROU",
    "date_from": "1999-02-11 07:00:00",
    "date_to": null,
    "description": "SURVEY MARKER BOLT",
    "geological": {
        "bedrock": {
            "condition": null,
            "type": null
        },
        "characteristic": null,
        "distance_to_fault": null,
        "fault_zone": "NO",
        "fracture_spacing": null
    },
    "iers_domes": "11401M001",
    "instrument_collocation": [],
    "local_ties": [],
    "location": {
        "city": "Bucuresti",
        "coordinates": {
            "X": 4093760.994,
            "Y": 2007793.667,
            "Z": 4445129.862,
            "altitude": 143.2,
            "lat": 44.463943793611584,
            "lon": 26.1257383431626
        },
        "country": "Romania",
        "country_iso_code": "ROU",
        "description": "",
        "state": "Capital",
        "tectonic": {
            "plate_name": "EURASIAN"
        }
    },
    "logs": {
        "contact": "TUCEB (gnss.bucu@utcb.ro)",
        "date": "2025-06-13 00:00:00",
        "log_type": "UPDATE",
        "modified": "UNAVAILABLE",
        "previous": "UNAVAILABLE",
        "title": "BUCU00ROU.xml"
    },
    "marker": "BUCU",
    "monument": {
        "description": "CONCRETE PILLAR ON THE ROOF",
        "foundation": "CONCRETE PILLAR ANCHORED ON THE BUILDING",
        "foundation_depth": null,
        "height": 1.45,
        "monument_inscription": "GPS PILLAR"
    },
    "monument_num": 0,
    "name": "Bucuresti \/ Romania",
    "receiver_num": 0,
    "station_contacts": [
        {
            "contact": {
                "agency": {
                    "abbreviation": "TUCEB",
                    "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                    "infos": "",
                    "name": "Technical University of Civil Engineering Bucharest",
                    "www": ""
                },
                "comment": "",
                "email": "gnss.bucu@utcb.ro",
                "name": "TUCEB",
                "phone": "+40 21 242 1208",
                "role": "site_owner",
                "title": ""
            }
        },
        {
            "contact": {
                "agency": {
                    "abbreviation": "TUCEB",
                    "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                    "infos": "",
                    "name": "Technical University of Civil Engineering Bucharest",
                    "www": ""
                },
                "comment": "",
                "email": "gnss.bucu@utcb.ro",
                "name": "TUCEB",
                "phone": "+40 21 242 1208",
                "role": "metadata_custodian",
                "title": ""
            }
        }
    ],
    "station_items": [
        {
            "item": {
                "comment": "Ashtech GPS Receiver XII,\r\nMdl. Z-12,\r\nP\/N 700845-10 (E)",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1999-02-11 07:00:00",
                "date_to": "1999-05-06 06:45:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "1999-05-06 06:45:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "ASHTECH Z-XII3"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "1999-05-06 06:45:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LP02396"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "1999-05-06 06:45:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "1999-05-06 06:45:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "1E95-1D01"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "1999-05-06 06:45:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "1999-05-06 06:45:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": "Ashtech GPS Receiver XII,\r\nMdl. Z-12,\r\nP\/N 700845-10 (E)",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1999-05-06 06:45:00",
                "date_to": "2008-10-30 09:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "1999-05-06 06:45:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "ASHTECH Z-XII3"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1999-05-06 06:45:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LP02396"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "1999-05-06 06:45:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "1999-05-06 06:45:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "1K00-1D04"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "1999-05-06 06:45:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "1999-05-06 06:45:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": "Prior 2009-01-29 the\r\nReceiver identified the\r\nFirmware Version with 6.00\r\nin the RINEX Headers.\r\nAfter 2009-01-29 the\r\nReceiver identified the\r\nFirmware Version with\r\n6.00\/3.015.",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2008-10-31 10:00:00",
                "date_to": "2009-04-22 09:49:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2009-04-22 09:49:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200GGPRO"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2009-04-22 09:49:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "355368"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2009-04-22 09:49:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2009-04-22 09:49:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "6.00\/3.015"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2009-04-22 09:49:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2009-04-22 09:49:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2009-04-22 09:50:00",
                "date_to": "2009-04-29 08:49:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2009-04-22 09:50:00",
                        "date_to": "2009-04-29 08:49:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200GGPRO"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2009-04-22 09:50:00",
                        "date_to": "2009-04-29 08:49:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "355368"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2009-04-22 09:50:00",
                        "date_to": "2009-04-29 08:49:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2009-04-22 09:50:00",
                        "date_to": "2009-04-29 08:49:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "7.01\/3.017"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2009-04-22 09:50:00",
                        "date_to": "2009-04-29 08:49:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2009-04-22 09:50:00",
                        "date_to": "2009-04-29 08:49:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2009-04-29 08:50:00",
                "date_to": "2010-01-29 12:48:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2009-04-29 08:50:00",
                        "date_to": "2010-01-29 12:48:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200GGPRO"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2009-04-29 08:50:00",
                        "date_to": "2010-01-29 12:48:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "355368"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2009-04-29 08:50:00",
                        "date_to": "2010-01-29 12:48:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2009-04-29 08:50:00",
                        "date_to": "2010-01-29 12:48:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "7.50\/3.017"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2009-04-29 08:50:00",
                        "date_to": "2010-01-29 12:48:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2009-04-29 08:50:00",
                        "date_to": "2010-01-29 12:48:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2010-01-29 12:49:00",
                "date_to": "2010-02-09 09:04:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2010-01-29 12:49:00",
                        "date_to": "2010-02-09 09:04:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200GGPRO"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2010-01-29 12:49:00",
                        "date_to": "2010-02-09 09:04:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "355368"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2010-01-29 12:49:00",
                        "date_to": "2010-02-09 09:04:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2010-01-29 12:49:00",
                        "date_to": "2010-02-09 09:04:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "7.50\/3.018"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2010-01-29 12:49:00",
                        "date_to": "2010-02-09 09:04:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2010-01-29 12:49:00",
                        "date_to": "2010-02-09 09:04:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2010-02-09 09:05:00",
                "date_to": "2010-04-30 14:44:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2010-02-09 09:05:00",
                        "date_to": "2010-04-30 14:44:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200GGPRO"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2010-02-09 09:05:00",
                        "date_to": "2010-04-30 14:44:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "355368"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2010-02-09 09:05:00",
                        "date_to": "2010-04-30 14:44:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2010-02-09 09:05:00",
                        "date_to": "2010-04-30 14:44:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "7.80\/3.018"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2010-02-09 09:05:00",
                        "date_to": "2010-04-30 14:44:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2010-02-09 09:05:00",
                        "date_to": "2010-04-30 14:44:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2010-04-30 14:45:00",
                "date_to": "2011-04-07 13:14:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2010-04-30 14:45:00",
                        "date_to": "2011-04-07 13:14:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200GGPRO"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2010-04-30 14:45:00",
                        "date_to": "2011-04-07 13:14:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "355368"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2010-04-30 14:45:00",
                        "date_to": "2011-04-07 13:14:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2010-04-30 14:45:00",
                        "date_to": "2011-04-07 13:14:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "7.80\/3.019"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2010-04-30 14:45:00",
                        "date_to": "2011-04-07 13:14:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2010-04-30 14:45:00",
                        "date_to": "2011-04-07 13:14:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2011-04-07 13:15:00",
                "date_to": "2014-06-13 08:30:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2011-04-07 13:15:00",
                        "date_to": "2014-06-13 08:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200GGPRO"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2011-04-07 13:15:00",
                        "date_to": "2014-06-13 08:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "355368"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2011-04-07 13:15:00",
                        "date_to": "2014-06-13 08:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2011-04-07 13:15:00",
                        "date_to": "2014-06-13 08:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "8.10\/3.019"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2011-04-07 13:15:00",
                        "date_to": "2014-06-13 08:30:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2011-04-07 13:15:00",
                        "date_to": "2014-06-13 08:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2014-06-13 09:05:00",
                "date_to": "2014-06-17 11:29:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2014-06-13 09:05:00",
                        "date_to": "2014-06-17 11:29:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200GGPRO"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2014-06-13 09:05:00",
                        "date_to": "2014-06-17 11:29:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "355368"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2014-06-13 09:05:00",
                        "date_to": "2014-06-17 11:29:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2014-06-13 09:05:00",
                        "date_to": "2014-06-17 11:29:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "8.10\/3.054"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2014-06-13 09:05:00",
                        "date_to": "2014-06-17 11:29:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2014-06-13 09:05:00",
                        "date_to": "2014-06-17 11:29:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2014-06-17 11:30:00",
                "date_to": "2020-10-06 09:15:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2014-06-17 11:30:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200GGPRO"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2014-06-17 11:30:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "355368"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2014-06-17 11:30:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2014-06-17 11:30:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "8.71\/3.822"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2014-06-17 11:30:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2014-06-17 11:30:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2020-10-06 10:00:00",
                "date_to": "2021-05-25 12:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": "2021-05-25 12:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GR50"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": "2021-05-25 12:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "1830199"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": "2021-05-25 12:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS+SBAS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": "2021-05-25 12:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "4.31\/7.103"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": "2021-05-25 12:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": "2021-05-25 12:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2021-05-25 12:15:00",
                "date_to": "2021-11-25 08:30:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2021-05-25 12:15:00",
                        "date_to": "2021-11-25 08:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GR50"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2021-05-25 12:15:00",
                        "date_to": "2021-11-25 08:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "1830199"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2021-05-25 12:15:00",
                        "date_to": "2021-11-25 08:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS+SBAS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2021-05-25 12:15:00",
                        "date_to": "2021-11-25 08:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "4.50\/7.710"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2021-05-25 12:15:00",
                        "date_to": "2021-11-25 08:30:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2021-05-25 12:15:00",
                        "date_to": "2021-11-25 08:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2021-11-25 08:45:00",
                "date_to": "2022-03-30 16:26:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2021-11-25 08:45:00",
                        "date_to": "2022-03-30 16:26:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GR50"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2021-11-25 08:45:00",
                        "date_to": "2022-03-30 16:26:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "1830199"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2021-11-25 08:45:00",
                        "date_to": "2022-03-30 16:26:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS+SBAS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2021-11-25 08:45:00",
                        "date_to": "2022-03-30 16:26:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "4.51\/7.710"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2021-11-25 08:45:00",
                        "date_to": "2022-03-30 16:26:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2021-11-25 08:45:00",
                        "date_to": "2022-03-30 16:26:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2022-03-30 16:36:00",
                "date_to": "2022-07-29 10:55:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2022-03-30 16:36:00",
                        "date_to": "2022-07-29 10:55:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GR50"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2022-03-30 16:36:00",
                        "date_to": "2022-07-29 10:55:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "1830199"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2022-03-30 16:36:00",
                        "date_to": "2022-07-29 10:55:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS+SBAS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2022-03-30 16:36:00",
                        "date_to": "2022-07-29 10:55:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "4.52\/7.711"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2022-03-30 16:36:00",
                        "date_to": "2022-07-29 10:55:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2022-03-30 16:36:00",
                        "date_to": "2022-07-29 10:55:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2022-07-29 11:05:00",
                "date_to": "2024-07-16 09:20:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2022-07-29 11:05:00",
                        "date_to": "2024-07-16 09:20:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GR50"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2022-07-29 11:05:00",
                        "date_to": "2024-07-16 09:20:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "1830199"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2022-07-29 11:05:00",
                        "date_to": "2024-07-16 09:20:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS+SBAS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2022-07-29 11:05:00",
                        "date_to": "2024-07-16 09:20:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "4.60\/7.811"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2022-07-29 11:05:00",
                        "date_to": "2024-07-16 09:20:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2022-07-29 11:05:00",
                        "date_to": "2024-07-16 09:20:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2024-07-16 09:35:00",
                "date_to": "2024-07-22 16:50:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2024-07-16 09:35:00",
                        "date_to": "2024-07-22 16:50:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GR50"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2024-07-16 09:35:00",
                        "date_to": "2024-07-22 16:50:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "1830199"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2024-07-16 09:35:00",
                        "date_to": "2024-07-22 16:50:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS+SBAS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2024-07-16 09:35:00",
                        "date_to": "2024-07-22 16:50:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "4.80\/7.900"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2024-07-16 09:35:00",
                        "date_to": "2024-07-22 16:50:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2024-07-16 09:35:00",
                        "date_to": "2024-07-22 16:50:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2024-07-22 17:05:00",
                "date_to": "2025-01-17 08:45:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2024-07-22 17:05:00",
                        "date_to": "2025-01-17 08:45:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GR50"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2024-07-22 17:05:00",
                        "date_to": "2025-01-17 08:45:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "1830199"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2024-07-22 17:05:00",
                        "date_to": "2025-01-17 08:45:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS+SBAS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2024-07-22 17:05:00",
                        "date_to": "2025-01-17 08:45:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "4.61\/7.811"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2024-07-22 17:05:00",
                        "date_to": "2025-01-17 08:45:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2024-07-22 17:05:00",
                        "date_to": "2025-01-17 08:45:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2025-01-17 09:00:00",
                "date_to": "2025-06-13 11:50:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2025-01-17 09:00:00",
                        "date_to": "2025-06-13 11:50:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GR50"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2025-01-17 09:00:00",
                        "date_to": "2025-06-13 11:50:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "1830199"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2025-01-17 09:00:00",
                        "date_to": "2025-06-13 11:50:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS+SBAS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2025-01-17 09:00:00",
                        "date_to": "2025-06-13 11:50:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "4.82\/7.900"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2025-01-17 09:00:00",
                        "date_to": "2025-06-13 11:50:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2025-01-17 09:00:00",
                        "date_to": "2025-06-13 11:50:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2025-06-13 11:58:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2025-06-13 11:58:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GR50"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2025-06-13 11:58:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "1830199"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2025-06-13 11:58:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS+SBAS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2025-06-13 11:58:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "4.83\/7.900"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2025-06-13 11:58:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2025-06-13 11:58:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": "Ashtech Choke Ring Antenna\nP\/N 700936 (D) with Dome",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1999-02-11 07:00:00",
                "date_to": "2000-03-13 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "antenna_type"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "2000-03-13 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "ASH700936D_M"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "2000-03-13 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "CR13737"
                    },
                    {
                        "attribute": {
                            "name": "antenna_reference_point"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "2000-03-13 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "BPA"
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_up_ecc"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "2000-03-13 00:00:00",
                        "value_date": null,
                        "value_numeric": 0.081,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_north_ecc"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "2000-03-13 00:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_east_ecc"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "2000-03-13 00:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "alignment_from_true_n"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "2000-03-13 00:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_type"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "2000-03-13 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "RG 214"
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_length"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "2000-03-13 00:00:00",
                        "value_date": null,
                        "value_numeric": 10,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": "Ashtech Choke Ring Antenna\nP\/N 700936 (D) with Dome",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1999-02-11 07:00:00",
                "date_to": "2000-03-13 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "radome_type"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "2000-03-13 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "SNOW"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1999-02-11 07:00:00",
                        "date_to": "2000-03-13 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
                "comment": "Ashtech Choke Ring Antenna\nP\/N 700936 (D) with Dome",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2000-03-13 00:00:00",
                "date_to": "2008-10-30 09:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "antenna_type"
                        },
                        "date_from": "2000-03-13 00:00:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "ASH700936D_M"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2000-03-13 00:00:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "CR13737"
                    },
                    {
                        "attribute": {
                            "name": "antenna_reference_point"
                        },
                        "date_from": "2000-03-13 00:00:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "BPA"
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_up_ecc"
                        },
                        "date_from": "2000-03-13 00:00:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": 0.0815,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_north_ecc"
                        },
                        "date_from": "2000-03-13 00:00:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_east_ecc"
                        },
                        "date_from": "2000-03-13 00:00:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "alignment_from_true_n"
                        },
                        "date_from": "2000-03-13 00:00:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_type"
                        },
                        "date_from": "2000-03-13 00:00:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "RG 214"
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_length"
                        },
                        "date_from": "2000-03-13 00:00:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": 10,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": "Ashtech Choke Ring Antenna\nP\/N 700936 (D) with Dome",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2000-03-13 00:00:00",
                "date_to": "2008-10-30 09:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "radome_type"
                        },
                        "date_from": "2000-03-13 00:00:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "SNOW"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2000-03-13 00:00:00",
                        "date_to": "2008-10-30 09:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
                "comment": "Antenna \/ radome pair individual\ncalibrated absolute at Geo++\n2008-04-15.",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2008-10-31 10:00:00",
                "date_to": "2020-10-06 09:15:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "antenna_type"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEIAT504GG"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "200456"
                    },
                    {
                        "attribute": {
                            "name": "antenna_reference_point"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "BPA"
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_up_ecc"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": 0.097,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_north_ecc"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_east_ecc"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "alignment_from_true_n"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_type"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "Leica GEV119"
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_length"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": 10,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": "Antenna \/ radome pair individual\ncalibrated absolute at Geo++\n2008-04-15.",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2008-10-31 10:00:00",
                "date_to": "2020-10-06 09:15:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "radome_type"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEIS"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2008-10-31 10:00:00",
                        "date_to": "2020-10-06 09:15:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2020-10-06 10:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "antenna_type"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEIAR25.R4"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "726369"
                    },
                    {
                        "attribute": {
                            "name": "antenna_reference_point"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "BPA"
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_up_ecc"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0.097,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_north_ecc"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_east_ecc"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "alignment_from_true_n"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_type"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "Leica GEV119"
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_length"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 10,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2020-10-06 10:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "radome_type"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEIT"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2020-10-06 10:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUCEB",
                        "address": "Lacul  Tei Boulevard 122-124 \/ 020396\nBucharest\nRomania",
                        "infos": "",
                        "name": "Technical University of Civil Engineering Bucharest",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss.bucu@utcb.ro",
                    "name": "TUCEB",
                    "phone": "+40 21 242 1208",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1999-02-11 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "standard_type"
                        },
                        "date_from": "1999-02-11 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "INTERNAL"
                    },
                    {
                        "attribute": {
                            "name": "input_frequency"
                        },
                        "date_from": "1999-02-11 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "frequency_standard"
                }
            }
        }
    ],
    "station_networks": [
        {
            "name": "EPN"
        },
        {
            "name": "EPOS"
        },
        {
            "name": "IGS"
        }
    ],
    "station_type": "GNSS Continuous"
}