{
    "cdp_num": null,
    "comment": "TUC2 site is installed and maintained by\r\nthe Geodesy and Geomatics Engineering Lab\r\nof the Mineral Resources Engineering Dept\r\nof the Technical University of Crete,\r\nChania, Greece.",
    "conditions": [],
    "country": "Greece",
    "country_code_ISO": "GRC",
    "date_from": "2004-06-16 00:00:00",
    "date_to": null,
    "description": "CENTER OF ANTENNA MOUNTING PLATE",
    "geological": {
        "bedrock": {
            "condition": "FRESH",
            "type": "SEDIMENTARY"
        },
        "characteristic": "BEDROCK",
        "distance_to_fault": null,
        "fault_zone": "NO",
        "fracture_spacing": "1-10"
    },
    "iers_domes": "12617M003",
    "instrument_collocation": [],
    "local_ties": [
        {
            "accuracy": 0.5,
            "comment": null,
            "cpd_num": null,
            "date_at": "2004-06-18 00:00:00",
            "dx": -0.2,
            "dy": 0.09,
            "dz": -1.003,
            "iers_domes": null,
            "name": "R00",
            "survey_method": "TRILATERATION\/TRIANGULATION\/LEVELLING",
            "usage": "LOCAL CONTROL"
        },
        {
            "accuracy": 0.5,
            "comment": null,
            "cpd_num": null,
            "date_at": "2004-06-18 00:00:00",
            "dx": -8.3,
            "dy": 6.82,
            "dz": -0.704,
            "iers_domes": null,
            "name": "R01",
            "survey_method": "TRILATERATION\/TRIANGULATION\/LEVELLING",
            "usage": "LOCAL CONTROL"
        },
        {
            "accuracy": 0.5,
            "comment": null,
            "cpd_num": null,
            "date_at": "2004-06-18 00:00:00",
            "dx": -0.65,
            "dy": 9.07,
            "dz": -0.864,
            "iers_domes": null,
            "name": "R02",
            "survey_method": "TRILATERATION\/TRIANGULATION\/LEVELLING",
            "usage": "LOCAL CONTROL"
        },
        {
            "accuracy": 0.5,
            "comment": null,
            "cpd_num": null,
            "date_at": "2004-06-18 00:00:00",
            "dx": 10.58,
            "dy": -4.75,
            "dz": -0.992,
            "iers_domes": null,
            "name": "R03",
            "survey_method": "TRILATERATION\/TRIANGULATION\/LEVELLING",
            "usage": "LOCAL CONTROL"
        },
        {
            "accuracy": 0.5,
            "comment": null,
            "cpd_num": null,
            "date_at": "2004-06-18 00:00:00",
            "dx": 5.6,
            "dy": -3.06,
            "dz": -0.949,
            "iers_domes": null,
            "name": "R04",
            "survey_method": "TRILATERATION\/TRIANGULATION\/LEVELLING",
            "usage": "LOCAL CONTROL"
        },
        {
            "accuracy": 0.5,
            "comment": null,
            "cpd_num": null,
            "date_at": "2004-06-18 00:00:00",
            "dx": -0.27,
            "dy": -17.12,
            "dz": -0.541,
            "iers_domes": null,
            "name": "R05",
            "survey_method": "TRILATERATION\/TRIANGULATION\/LEVELLING",
            "usage": "LOCAL CONTROL"
        },
        {
            "accuracy": 0.5,
            "comment": null,
            "cpd_num": null,
            "date_at": "2004-06-18 00:00:00",
            "dx": -1.09,
            "dy": -16.45,
            "dz": -0.544,
            "iers_domes": null,
            "name": "SLR0",
            "survey_method": "GPS CAMPAIGN\/TRIANGULATION\/LEVELLING",
            "usage": "SLR, LOCAL CONTROL, GPS"
        }
    ],
    "location": {
        "city": "Chania",
        "coordinates": {
            "X": 4744543.851,
            "Y": 2119411.87,
            "Z": 3686258.942,
            "altitude": 161,
            "lat": 35.53319097980058,
            "lon": 24.070558421461953
        },
        "country": "Greece",
        "country_iso_code": "GRC",
        "description": "TUC2 site is located in the Technical\r\nUniversity of Crete Campus, Chania, Greece.",
        "state": "Crete",
        "tectonic": {
            "plate_name": "EURASIAN"
        }
    },
    "logs": {
        "contact": "Stelios P. Mertikas",
        "date": "2020-07-17 00:00:00",
        "log_type": "UPDATE",
        "modified": "UNAVAILABLE",
        "previous": "UNAVAILABLE",
        "title": "TUC200GRC.xml"
    },
    "marker": "TUC2",
    "monument": {
        "description": "PILLAR",
        "foundation": "CONCRETE BLOCK",
        "foundation_depth": 0.7,
        "height": 1.2,
        "monument_inscription": null
    },
    "monument_num": 0,
    "name": "Technical University of Crete",
    "receiver_num": 0,
    "station_contacts": [
        {
            "contact": {
                "agency": {
                    "abbreviation": "TUC",
                    "address": "University Campus\n73100 Chania\nGreece",
                    "infos": "",
                    "name": "Technical University of Crete",
                    "www": ""
                },
                "comment": "",
                "email": "mertikas@mred.tuc.gr",
                "name": "Stelios P. Mertikas",
                "phone": "+30 2821 037629",
                "role": "site_owner",
                "title": ""
            }
        },
        {
            "contact": {
                "agency": {
                    "abbreviation": "TUC",
                    "address": "University Campus\n73100 Chania\nGreece",
                    "infos": "",
                    "name": "Technical University of Crete",
                    "www": ""
                },
                "comment": "",
                "email": "mertikas@mred.tuc.gr",
                "name": "Stelios P. Mertikas",
                "phone": "+30 2821 037629",
                "role": "metadata_custodian",
                "title": ""
            }
        }
    ],
    "station_items": [
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2004-06-20 00:00:00",
                "date_to": "2008-12-10 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2008-12-10 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA RS500"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2008-12-10 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "0080199"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2008-12-10 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2008-12-10 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "4.2"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2008-12-10 00:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2008-12-10 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": "GRX1200GGPRO Receiver is capable of recording\r\nGlonass data. However this is not done because\r\nthe Glonass option is locked on the receiver.\r\nThe local leica vendor was not providing the\r\noption free of charge and the given budget at\r\nthe time was not enough to unlock this option.\r\nOn 17 March 2010 (DOY 2010\/076, 13:20 UTC) the\r\n'Code smoothing' tracking parameter was changed\r\nfrom 'Smoothed' to 'Not smoothed'.",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2008-12-10 00:00:00",
                "date_to": "2010-06-14 06:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2008-12-10 00:00:00",
                        "date_to": "2010-06-14 06:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200GGPRO"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2008-12-10 00:00:00",
                        "date_to": "2010-06-14 06:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "352838"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2008-12-10 00:00:00",
                        "date_to": "2010-06-14 06:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2008-12-10 00:00:00",
                        "date_to": "2010-06-14 06:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "5.62\/3.014"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2008-12-10 00:00:00",
                        "date_to": "2010-06-14 06:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2008-12-10 00:00:00",
                        "date_to": "2010-06-14 06:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": "GRX1200GGPRO Receiver is capable of recording\r\nGlonass data. However this is not done because\r\nthe Glonass option is locked on the receiver.\r\nThe local leica vendor was not providing the\r\noption free of charge and the given budget at\r\nthe time was not enough to unlock this option.\r\nOn 17 March 2010 (DOY 2010\/076, 13:20 UTC) the\r\n'Code smoothing' tracking parameter was changed\r\nfrom 'Smoothed' to 'Not smoothed'.",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2010-06-14 07:00:00",
                "date_to": "2010-07-15 06:30:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2010-06-14 07:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200GGPRO"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2010-06-14 07:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "352838"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2010-06-14 07:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2010-06-14 07:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "8.00\/3.019"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2010-06-14 07:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2010-06-14 07:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2010-07-15 09:10:00",
                "date_to": "2011-03-11 11:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": "2011-03-11 11:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200+GNSS"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": "2011-03-11 11:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "495906"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": "2011-03-11 11:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": "2011-03-11 11:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "8.00\/4.004"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": "2011-03-11 11:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": "2011-03-11 11:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2011-03-11 11:00:00",
                "date_to": "2014-05-05 08:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2011-03-11 11:00:00",
                        "date_to": "2014-05-05 08:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200+GNSS"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2011-03-11 11:00:00",
                        "date_to": "2014-05-05 08:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "495906"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2011-03-11 11:00:00",
                        "date_to": "2014-05-05 08:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2011-03-11 11:00:00",
                        "date_to": "2014-05-05 08:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "8.10\/4.004"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2011-03-11 11:00:00",
                        "date_to": "2014-05-05 08:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2011-03-11 11:00:00",
                        "date_to": "2014-05-05 08:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2014-05-05 08:00:00",
                "date_to": "2015-01-21 08:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2014-05-05 08:00:00",
                        "date_to": "2015-01-21 08:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200+GNSS"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2014-05-05 08:00:00",
                        "date_to": "2015-01-21 08:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "495906"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2014-05-05 08:00:00",
                        "date_to": "2015-01-21 08:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2014-05-05 08:00:00",
                        "date_to": "2015-01-21 08:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "8.71\/6.112"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2014-05-05 08:00:00",
                        "date_to": "2015-01-21 08:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2014-05-05 08:00:00",
                        "date_to": "2015-01-21 08:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2015-01-21 08:00:00",
                "date_to": "2019-03-29 07:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2015-01-21 08:00:00",
                        "date_to": "2019-03-29 07:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200+GNSS"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2015-01-21 08:00:00",
                        "date_to": "2019-03-29 07:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "495906"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2015-01-21 08:00:00",
                        "date_to": "2019-03-29 07:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2015-01-21 08:00:00",
                        "date_to": "2019-03-29 07:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "9.20\/6.404"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2015-01-21 08:00:00",
                        "date_to": "2019-03-29 07:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2015-01-21 08:00:00",
                        "date_to": "2019-03-29 07:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NaN"
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2019-03-29 07:00:00",
                "date_to": "2020-07-11 23:59:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2019-03-29 07:00:00",
                        "date_to": "2020-07-11 23:59:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200+GNSS"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2019-03-29 07:00:00",
                        "date_to": "2020-07-11 23:59:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "495906"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2019-03-29 07:00:00",
                        "date_to": "2020-07-11 23:59:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2019-03-29 07:00:00",
                        "date_to": "2020-07-11 23:59:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "9.20\/6.405"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2019-03-29 07:00:00",
                        "date_to": "2020-07-11 23:59:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2019-03-29 07:00:00",
                        "date_to": "2020-07-11 23:59:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2020-07-12 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
                        },
                        "date_from": "2020-07-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEICA GRX1200+GNSS"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2020-07-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "495906"
                    },
                    {
                        "attribute": {
                            "name": "satellite_system"
                        },
                        "date_from": "2020-07-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "GPS+GLO+GAL+BDS"
                    },
                    {
                        "attribute": {
                            "name": "firmware_version"
                        },
                        "date_from": "2020-07-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "9.20\/6.405"
                    },
                    {
                        "attribute": {
                            "name": "elevation_cutoff_setting"
                        },
                        "date_from": "2020-07-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "temperature_stabilization"
                        },
                        "date_from": "2020-07-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": "Removed due to poor quality of data\r\n(Satellite visibility problems in North\r\nsector)",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2004-06-20 00:00:00",
                "date_to": "2004-10-14 10:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "antenna_type"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2004-10-14 10:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEIAT504"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2004-10-14 10:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "212"
                    },
                    {
                        "attribute": {
                            "name": "antenna_reference_point"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2004-10-14 10:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "BPA"
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_up_ecc"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2004-10-14 10:00:00",
                        "value_date": null,
                        "value_numeric": 0.0337,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_north_ecc"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2004-10-14 10:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_east_ecc"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2004-10-14 10:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "alignment_from_true_n"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2004-10-14 10:00:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_type"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2004-10-14 10:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "Leica supplied"
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_length"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2004-10-14 10:00:00",
                        "value_date": null,
                        "value_numeric": 30,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": "Removed due to poor quality of data\r\n(Satellite visibility problems in North\r\nsector)",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2004-06-20 00:00:00",
                "date_to": "2004-10-14 10:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "radome_type"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2004-10-14 10:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NONE"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2004-06-20 00:00:00",
                        "date_to": "2004-10-14 10:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2004-10-14 10:00:00",
                "date_to": "2010-07-15 06:30:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "antenna_type"
                        },
                        "date_from": "2004-10-14 10:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEIAT504"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2004-10-14 10:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "424"
                    },
                    {
                        "attribute": {
                            "name": "antenna_reference_point"
                        },
                        "date_from": "2004-10-14 10:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "BPA"
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_up_ecc"
                        },
                        "date_from": "2004-10-14 10:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": 0.0343,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_north_ecc"
                        },
                        "date_from": "2004-10-14 10:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_east_ecc"
                        },
                        "date_from": "2004-10-14 10:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "alignment_from_true_n"
                        },
                        "date_from": "2004-10-14 10:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_type"
                        },
                        "date_from": "2004-10-14 10:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "Leica supplied"
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_length"
                        },
                        "date_from": "2004-10-14 10:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": 30,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2004-10-14 10:00:00",
                "date_to": "2010-07-15 06:30:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "radome_type"
                        },
                        "date_from": "2004-10-14 10:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NONE"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2004-10-14 10:00:00",
                        "date_to": "2010-07-15 06:30:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2010-07-15 09:10:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "antenna_type"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LEIAR25.R3"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "10020008"
                    },
                    {
                        "attribute": {
                            "name": "antenna_reference_point"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "BPA"
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_up_ecc"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0.0393,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_north_ecc"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_east_ecc"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "alignment_from_true_n"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_type"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "Leica supplied"
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_length"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 30,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2010-07-15 09:10:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "radome_type"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NONE"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2010-07-15 09:10:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2004-06-16 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "standard_type"
                        },
                        "date_from": "2004-06-16 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "INTERNAL"
                    },
                    {
                        "attribute": {
                            "name": "input_frequency"
                        },
                        "date_from": "2004-06-16 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "frequency_standard"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2003-09-01 00:00:00",
                "date_to": "2006-12-12 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "HMP45A-P Humidity and Temperature probe"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "Vaisala Oyj, Finland"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "X1540004"
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": 180,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": 1,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "aspiration"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NATURAL"
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": 16,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": "2003-05-27 00:00:00",
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "humidity_sensor"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2006-12-12 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "PAROSCIENTIFIC MET3"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "PAROSCIENTIFIC"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "X1550001"
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 60,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 1,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "aspiration"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NATURAL"
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 2,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": "2006-10-10 00:00:00",
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "humidity_sensor"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2003-09-01 00:00:00",
                "date_to": "2006-12-12 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "PTU200 Class A PTU transmitter"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "Vaisala Oyj, Finland"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "X1540004"
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": 180,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": 0.07,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": 13,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": "2002-04-11 00:00:00",
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "pressure_sensor"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2006-12-12 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "PAROSCIENTIFIC MET3"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "PAROSCIENTIFIC"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "X1550001"
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 60,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0.07,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 2,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": "2006-10-10 00:00:00",
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "pressure_sensor"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2003-09-01 00:00:00",
                "date_to": "2006-12-12 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "HMP45A-P Humidity and Temperature probe"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "Vaisala Oyj, Finland"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "X1540004"
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": 180,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": 0.15,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "aspiration"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NATURAL"
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": null,
                        "value_numeric": 16,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "2003-09-01 00:00:00",
                        "date_to": "2006-12-12 00:00:00",
                        "value_date": "2003-05-27 00:00:00",
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "temperature_sensor"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "TUC",
                        "address": "University Campus\n73100 Chania\nGreece",
                        "infos": "",
                        "name": "Technical University of Crete",
                        "www": ""
                    },
                    "comment": "",
                    "email": "mertikas@mred.tuc.gr",
                    "name": "Stelios P. Mertikas",
                    "phone": "+30 2821 037629",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2006-12-12 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "PAROSCIENTIFIC MET3"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "PAROSCIENTIFIC"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "X1550001"
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 60,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0.15,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "aspiration"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NATURAL"
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 2,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "2006-12-12 00:00:00",
                        "date_to": null,
                        "value_date": "2006-10-10 00:00:00",
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "temperature_sensor"
                }
            }
        }
    ],
    "station_networks": [
        {
            "name": "EPN"
        },
        {
            "name": "EPOS"
        }
    ],
    "station_type": "GNSS Continuous"
}