{
    "cdp_num": null,
    "comment": "point of POLREF, EPOCH-92, CERGOP, point\nof geodyn. network SAGET & EXTENDED SAGET",
    "conditions": [
        {
            "comments": "more details: Fraczyk P. et al. in\nArtificial Satellites, Vol.33, No2 1998,\npp.109-115.\nreduced by the new antenna replacing\n(see 4.2)",
            "date_from": "1998-02-01 00:00:00",
            "date_to": "1999-05-31 00:00:00",
            "type": "radio_interferences: CELL PHONE RELAY, RADAR"
        }
    ],
    "country": "Poland",
    "country_code_ISO": "POL",
    "date_from": "1994-01-01 00:00:00",
    "date_to": null,
    "description": "BRASS SCREW",
    "geological": {
        "bedrock": {
            "condition": "JOINTED",
            "type": "SEDIMENTARY"
        },
        "characteristic": "CLAY",
        "distance_to_fault": null,
        "fault_zone": "Teisseyre",
        "fracture_spacing": "1-10"
    },
    "iers_domes": "12205M002",
    "instrument_collocation": [],
    "local_ties": [
        {
            "accuracy": 3,
            "comment": "campaigns\nEUREF-POL'92, BSL-93, POLREF.",
            "cpd_num": null,
            "date_at": "1994-01-10 00:00:00",
            "dx": 38.388,
            "dy": 112.238,
            "dz": -63.394,
            "iers_domes": "12205M001",
            "name": "EUREF 216",
            "survey_method": "GPS CAMPAIGN",
            "usage": "LOCAL CONTROL, SPECIAL CAMPAIGNS"
        },
        {
            "accuracy": 3,
            "comment": null,
            "cpd_num": "7811",
            "date_at": "1994-01-10 00:00:00",
            "dx": -25.767,
            "dy": 72.908,
            "dz": 0.324,
            "iers_domes": "12205S001",
            "name": "BORL",
            "survey_method": "GPS CAMPAIGN",
            "usage": "SLR"
        }
    ],
    "location": {
        "city": "Borowiec",
        "coordinates": {
            "X": 3738358.833,
            "Y": 1148173.963,
            "Z": 5021816.113,
            "altitude": 124.9,
            "lat": 52.27695555148466,
            "lon": 17.073458338581613
        },
        "country": "Poland",
        "country_iso_code": "POL",
        "description": "Near KORNIK & POZNAN",
        "state": "Wielkopolska",
        "tectonic": {
            "plate_name": "EURASIAN"
        }
    },
    "logs": {
        "contact": "BOR1 GNSS team (bor1gnss@cbk.poznan.pl)",
        "date": "2025-04-03 00:00:00",
        "log_type": "UPDATE",
        "modified": "UNAVAILABLE",
        "previous": "UNAVAILABLE",
        "title": "BOR100POL.xml"
    },
    "marker": "BOR1",
    "monument": {
        "description": "PILLAR",
        "foundation": "ROOF",
        "foundation_depth": null,
        "height": null,
        "monument_inscription": "stable geodynamical pillar on the roof"
    },
    "monument_num": 0,
    "name": "BOROWIEC",
    "receiver_num": 0,
    "station_contacts": [
        {
            "contact": {
                "agency": {
                    "abbreviation": "SRCPAS",
                    "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                    "infos": "",
                    "name": "Astrogeodynamical Observatory",
                    "www": ""
                },
                "comment": "",
                "email": "bor1gnss@cbk.poznan.pl",
                "name": "BOR1 GNSS team",
                "phone": "",
                "role": "site_owner",
                "title": ""
            }
        },
        {
            "contact": {
                "agency": {
                    "abbreviation": "SRCPAS",
                    "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                    "infos": "",
                    "name": "Astrogeodynamical Observatory",
                    "www": ""
                },
                "comment": "",
                "email": "bor1gnss@cbk.poznan.pl",
                "name": "BOR1 GNSS team",
                "phone": "",
                "role": "metadata_custodian",
                "title": ""
            }
        }
    ],
    "station_items": [
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1994-01-10 00:00:00",
                "date_to": "1999-08-22 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-08-22 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "ROGUE SNR-8000"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-08-22 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "00196"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-08-22 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-08-22 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "2.8"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-08-22 00:00:00",
                        "value_date": null,
                        "value_numeric": 10,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-08-22 00:00:00",
                        "value_date": null,
                        "value_numeric": 4,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": "correction of the Receiver Number Style\nfrom S\/N 196 to T-196 was made on\n31 May 2001",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1999-08-27 18:00:00",
                "date_to": "2002-03-05 23:24:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "1999-08-27 18:00:00",
                        "date_to": "2002-03-05 23:24:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "ROGUE SNR-8000"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1999-08-27 18:00:00",
                        "date_to": "2002-03-05 23:24:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "T196"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "1999-08-27 18:00:00",
                        "date_to": "2002-03-05 23:24:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "1999-08-27 18:00:00",
                        "date_to": "2002-03-05 23:24:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "3.2.32.9"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "1999-08-27 18:00:00",
                        "date_to": "2002-03-05 23:24:00",
                        "value_date": null,
                        "value_numeric": 4,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "1999-08-27 18:00:00",
                        "date_to": "2002-03-05 23:24:00",
                        "value_date": null,
                        "value_numeric": 4,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": "firmware upgrade",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2002-03-06 00:00:00",
                "date_to": "2007-07-07 23:59:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2002-03-06 00:00:00",
                        "date_to": "2007-07-07 23:59:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "ROGUE SNR-8000"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2002-03-06 00:00:00",
                        "date_to": "2007-07-07 23:59:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "T196"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2002-03-06 00:00:00",
                        "date_to": "2007-07-07 23:59:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2002-03-06 00:00:00",
                        "date_to": "2007-07-07 23:59:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "3.2.32.11"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2002-03-06 00:00:00",
                        "date_to": "2007-07-07 23:59:00",
                        "value_date": null,
                        "value_numeric": 4,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2002-03-06 00:00:00",
                        "date_to": "2007-07-07 23:59:00",
                        "value_date": null,
                        "value_numeric": 4,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2007-07-08 00:00:00",
                "date_to": "2008-03-06 13:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2007-07-08 00:00:00",
                        "date_to": "2008-03-06 13:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "TRIMBLE NETRS"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2007-07-08 00:00:00",
                        "date_to": "2008-03-06 13:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "4623116529"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2007-07-08 00:00:00",
                        "date_to": "2008-03-06 13:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2007-07-08 00:00:00",
                        "date_to": "2008-03-06 13:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "1.1-3"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2007-07-08 00:00:00",
                        "date_to": "2008-03-06 13:00:00",
                        "value_date": null,
                        "value_numeric": 4,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2007-07-08 00:00:00",
                        "date_to": "2008-03-06 13:00:00",
                        "value_date": null,
                        "value_numeric": 2,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2008-03-06 13:00:00",
                "date_to": "2016-10-05 09:47:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2008-03-06 13:00:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "TRIMBLE NETRS"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2008-03-06 13:00:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "4623116529"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2008-03-06 13:00:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2008-03-06 13:00:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "1.2-0  Apr 26 2007"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2008-03-06 13:00:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": 4,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2008-03-06 13:00:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": 2,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2016-10-05 11:00:00",
                "date_to": "2017-02-21 09:30:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": "2017-02-21 09:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "TRIMBLE NETR9"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": "2017-02-21 09:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "5420R48510"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": "2017-02-21 09:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS+QZSS+SBAS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": "2017-02-21 09:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "5.14"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": "2017-02-21 09:30:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": "2017-02-21 09:30:00",
                        "value_date": null,
                        "value_numeric": 2,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2017-02-21 09:30:00",
                "date_to": "2018-12-28 16:30:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2017-02-21 09:30:00",
                        "date_to": "2018-12-28 16:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "TRIMBLE NETR9"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2017-02-21 09:30:00",
                        "date_to": "2018-12-28 16:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "5420R48510"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2017-02-21 09:30:00",
                        "date_to": "2018-12-28 16:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS+QZSS+SBAS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2017-02-21 09:30:00",
                        "date_to": "2018-12-28 16:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "5.20"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2017-02-21 09:30:00",
                        "date_to": "2018-12-28 16:30:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2017-02-21 09:30:00",
                        "date_to": "2018-12-28 16:30:00",
                        "value_date": null,
                        "value_numeric": 2,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2018-12-28 16:40:00",
                "date_to": "2020-09-18 10:20:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2018-12-28 16:40:00",
                        "date_to": "2020-09-18 10:20:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "TRIMBLE NETR9"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2018-12-28 16:40:00",
                        "date_to": "2020-09-18 10:20:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "5420R48510"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2018-12-28 16:40:00",
                        "date_to": "2020-09-18 10:20:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS+QZSS+SBAS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2018-12-28 16:40:00",
                        "date_to": "2020-09-18 10:20:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "5.37"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2018-12-28 16:40:00",
                        "date_to": "2020-09-18 10:20:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2018-12-28 16:40:00",
                        "date_to": "2020-09-18 10:20:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2020-09-18 10:20:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2020-09-18 10:20:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "TRIMBLE NETR9"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2020-09-18 10:20:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "5420R48510"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2020-09-18 10:20:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS+QZSS+SBAS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2020-09-18 10:20:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "5.45"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2020-09-18 10:20:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2020-09-18 10:20:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1994-01-10 00:00:00",
                "date_to": "1999-05-31 18:10:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "antenna_type"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-05-31 18:10:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "AOAD\/M_T"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-05-31 18:10:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "00271"
                    },
                    {
                        "attribute": {
                            "name": "antenna_reference_point"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-05-31 18:10:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "BPA"
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_up_ecc"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-05-31 18:10:00",
                        "value_date": null,
                        "value_numeric": 0.0621,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_north_ecc"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-05-31 18:10:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_east_ecc"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-05-31 18:10:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "alignment_from_true_n"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-05-31 18:10:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_type"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-05-31 18:10:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "AOA 7490045"
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_length"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-05-31 18:10:00",
                        "value_date": null,
                        "value_numeric": 10,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1994-01-10 00:00:00",
                "date_to": "1999-05-31 18:10:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "radome_type"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-05-31 18:10:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NONE"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "1999-05-31 18:10:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
                "comment": "Model 7490582-2\ncorrection of the Antenna Number Style\nfrom S\/N 418 to 418 was made on\n31 May 2001",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1999-05-31 18:40:00",
                "date_to": "2016-10-05 09:47:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "antenna_type"
                        },
                        "date_from": "1999-05-31 18:40:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "AOAD\/M_T"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1999-05-31 18:40:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "418"
                    },
                    {
                        "attribute": {
                            "name": "antenna_reference_point"
                        },
                        "date_from": "1999-05-31 18:40:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "BPA"
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_up_ecc"
                        },
                        "date_from": "1999-05-31 18:40:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": 0.0624,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_north_ecc"
                        },
                        "date_from": "1999-05-31 18:40:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_east_ecc"
                        },
                        "date_from": "1999-05-31 18:40:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "alignment_from_true_n"
                        },
                        "date_from": "1999-05-31 18:40:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_type"
                        },
                        "date_from": "1999-05-31 18:40:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "AOA 7490045"
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_length"
                        },
                        "date_from": "1999-05-31 18:40:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": 10,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": "Model 7490582-2\ncorrection of the Antenna Number Style\nfrom S\/N 418 to 418 was made on\n31 May 2001",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1999-05-31 18:40:00",
                "date_to": "2016-10-05 09:47:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "radome_type"
                        },
                        "date_from": "1999-05-31 18:40:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NONE"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1999-05-31 18:40:00",
                        "date_to": "2016-10-05 09:47:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2016-10-05 11:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "antenna_type"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "TRM59800.00"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "5421355014"
                    },
                    {
                        "attribute": {
                            "name": "antenna_reference_point"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "BPA"
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_up_ecc"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0.0622,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_north_ecc"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_east_ecc"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "alignment_from_true_n"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_type"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "AOA 7490045"
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_length"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 10,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2016-10-05 11:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "radome_type"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NONE"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2016-10-05 11:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
                "comment": "Oscilloquartz EUDICS 302",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1994-01-10 00:00:00",
                "date_to": "2001-11-28 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "standard_type"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "2001-11-28 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "EXTERNAL CESIUM"
                    },
                    {
                        "attribute": {
                            "name": "input_frequency"
                        },
                        "date_from": "1994-01-10 00:00:00",
                        "date_to": "2001-11-28 00:00:00",
                        "value_date": null,
                        "value_numeric": 5,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "frequency_standard"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2001-11-29 00:00:00",
                "date_to": "2001-12-02 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "standard_type"
                        },
                        "date_from": "2001-11-29 00:00:00",
                        "date_to": "2001-12-02 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "INTERNAL"
                    },
                    {
                        "attribute": {
                            "name": "input_frequency"
                        },
                        "date_from": "2001-11-29 00:00:00",
                        "date_to": "2001-12-02 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "frequency_standard"
                }
            }
        },
        {
            "item": {
                "comment": "AGILENT TECHNOLOGIES 5071 A opt 001",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2001-12-03 00:00:00",
                "date_to": "2007-07-07 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "standard_type"
                        },
                        "date_from": "2001-12-03 00:00:00",
                        "date_to": "2007-07-07 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "EXTERNAL CESIUM"
                    },
                    {
                        "attribute": {
                            "name": "input_frequency"
                        },
                        "date_from": "2001-12-03 00:00:00",
                        "date_to": "2007-07-07 00:00:00",
                        "value_date": null,
                        "value_numeric": 5,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "frequency_standard"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2007-07-08 00:00:00",
                "date_to": "2016-10-05 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "standard_type"
                        },
                        "date_from": "2007-07-08 00:00:00",
                        "date_to": "2016-10-05 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "INTERNAL"
                    },
                    {
                        "attribute": {
                            "name": "input_frequency"
                        },
                        "date_from": "2007-07-08 00:00:00",
                        "date_to": "2016-10-05 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "frequency_standard"
                }
            }
        },
        {
            "item": {
                "comment": "KVARZ CH1-75A",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2016-10-05 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "standard_type"
                        },
                        "date_from": "2016-10-05 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "EXTERNAL H-MASER"
                    },
                    {
                        "attribute": {
                            "name": "input_frequency"
                        },
                        "date_from": "2016-10-05 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 5,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "frequency_standard"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1995-01-01 00:00:00",
                "date_to": "2002-12-31 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "HPTL.3A"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NAVI Ltd.,Sporna 11, PL 61-709 POZNAN"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": 1800,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": 3,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "aspiration"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "UNASPIRATED"
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": -4,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "humidity_sensor"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2007-07-01 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "HPTL.3A"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NAVI Ltd.,Promienista 5\/1, PL 60-288 POZNAN"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 600,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 3,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "aspiration"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "UNASPIRATED"
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "humidity_sensor"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1995-01-01 00:00:00",
                "date_to": "2002-12-31 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "HPTL.3A"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NAVI Ltd.,Sporna 11, PL 61-709 POZNAN"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": 1800,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": 0.25,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": -4,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "pressure_sensor"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2007-07-01 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "SKPS 800\/I"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "Skye Instruments Ltd."
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "31052"
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 600,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0.25,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "pressure_sensor"
                }
            }
        },
        {
            "item": {
                "comment": "5% in full temperature range",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1995-01-01 00:00:00",
                "date_to": "2002-12-31 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "HPTL.3A"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NAVI Ltd.,Sporna 11, PL 61-709 POZNAN"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": 1800,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "aspiration"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "UNASPIRATED"
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": -4,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "1995-01-01 00:00:00",
                        "date_to": "2002-12-31 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "temperature_sensor"
                }
            }
        },
        {
            "item": {
                "comment": "5% in full temperature range",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "SRCPAS",
                        "address": "ul. Drapa\u0142ka 4\n62-035 Kornik, Borowiec\nPoland",
                        "infos": "",
                        "name": "Astrogeodynamical Observatory",
                        "www": ""
                    },
                    "comment": "",
                    "email": "bor1gnss@cbk.poznan.pl",
                    "name": "BOR1 GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2007-07-01 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "HPTL.3A"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NAVI Ltd.,Promienista 5\/1, PL 60-288 POZNAN"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 600,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "aspiration"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "UNASPIRATED"
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "2007-07-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "temperature_sensor"
                }
            }
        }
    ],
    "station_networks": [
        {
            "name": "EPN"
        },
        {
            "name": "EPOS"
        },
        {
            "name": "IGS"
        }
    ],
    "station_type": "GNSS Continuous"
}