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                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": "1) Antenna removed because of heavy storm\r\n2) From 08-JUN-1996 to 17-JUL-2001\r\nan incorrect antenna number (11657)\r\nhas been used for this antenna.",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1996-06-08 00:00:00",
                "date_to": "2001-07-17 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "radome_type"
                        },
                        "date_from": "1996-06-08 00:00:00",
                        "date_to": "2001-07-17 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "SNOW"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1996-06-08 00:00:00",
                        "date_to": "2001-07-17 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
                "comment": "Antenna in 4.1 reinstalled at\r\nthe former position",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2001-08-17 13:30:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "antenna_type"
                        },
                        "date_from": "2001-08-17 13:30:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "ASH700936C_M"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2001-08-17 13:30:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "11957"
                    },
                    {
                        "attribute": {
                            "name": "antenna_reference_point"
                        },
                        "date_from": "2001-08-17 13:30:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "BPA"
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_up_ecc"
                        },
                        "date_from": "2001-08-17 13:30:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_north_ecc"
                        },
                        "date_from": "2001-08-17 13:30:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "marker_arp_east_ecc"
                        },
                        "date_from": "2001-08-17 13:30:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "alignment_from_true_n"
                        },
                        "date_from": "2001-08-17 13:30:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_type"
                        },
                        "date_from": "2001-08-17 13:30:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "antenna_cable_length"
                        },
                        "date_from": "2001-08-17 13:30:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 30,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": "Antenna in 4.1 reinstalled at\r\nthe former position",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2001-08-17 13:30:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "radome_type"
                        },
                        "date_from": "2001-08-17 13:30:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "SNOW"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2001-08-17 13:30:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1996-06-08 00:00:00",
                "date_to": "1998-01-01 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "standard_type"
                        },
                        "date_from": "1996-06-08 00:00:00",
                        "date_to": "1998-01-01 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "EXTERNAL QUARTZ"
                    },
                    {
                        "attribute": {
                            "name": "input_frequency"
                        },
                        "date_from": "1996-06-08 00:00:00",
                        "date_to": "1998-01-01 00:00:00",
                        "value_date": null,
                        "value_numeric": 5,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "frequency_standard"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1998-01-01 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "standard_type"
                        },
                        "date_from": "1998-01-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "EXTERNAL RUBIDIUM"
                    },
                    {
                        "attribute": {
                            "name": "input_frequency"
                        },
                        "date_from": "1998-01-01 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 5,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "frequency_standard"
                }
            }
        },
        {
            "item": {
                "comment": "placed in the meteorological box",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1999-05-17 00:00:00",
                "date_to": "2004-07-22 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LB-710HB"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LAB-EL"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": 600,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": 0.8,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "aspiration"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NATURAL"
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": 7,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": "1999-04-01 00:00:00",
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "humidity_sensor"
                }
            }
        },
        {
            "item": {
                "comment": "placed in the meteorological box",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2005-04-15 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "2005-04-15 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LB-710HB"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "2005-04-15 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LAB-EL"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "2005-04-15 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "2005-04-15 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 300,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "2005-04-15 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0.8,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "aspiration"
                        },
                        "date_from": "2005-04-15 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "NATURAL"
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "2005-04-15 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 7,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "2005-04-15 00:00:00",
                        "date_to": null,
                        "value_date": "2005-04-01 00:00:00",
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "humidity_sensor"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1999-05-17 00:00:00",
                "date_to": "2004-07-22 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
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                        "value_varchar": "LB-716"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
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                        "value_varchar": "LAB-EL"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": 600,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
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                        "value_varchar": null
                    },
                    {
                        "attribute": {
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                        "date_from": "1999-05-17 00:00:00",
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                        "value_numeric": 8,
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                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
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                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": "1999-04-01 00:00:00",
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "pressure_sensor"
                }
            }
        },
        {
            "item": {
                "comment": null,
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "IGIK",
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                        "infos": "",
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                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2005-04-15 00:00:00",
                "date_to": null,
                "item_attributes": [
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                        "attribute": {
                            "name": "sensor_model"
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                        "date_to": null,
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                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
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                        "date_from": "2005-04-15 00:00:00",
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                        "value_date": null,
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                        "value_varchar": "LAB-EL"
                    },
                    {
                        "attribute": {
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                        "date_from": "2005-04-15 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "2005-04-15 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 300,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "2005-04-15 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 0.5,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "2005-04-15 00:00:00",
                        "date_to": null,
                        "value_date": null,
                        "value_numeric": 8,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "2005-04-15 00:00:00",
                        "date_to": null,
                        "value_date": "2005-04-01 00:00:00",
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "pressure_sensor"
                }
            }
        },
        {
            "item": {
                "comment": "placed in the meteorological box",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "1999-05-17 00:00:00",
                "date_to": "2004-07-22 00:00:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LB-710HB"
                    },
                    {
                        "attribute": {
                            "name": "manufacturer"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "LAB-EL"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": 600,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "accuracy"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": 0.15,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "aspiration"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": null,
                        "value_numeric": null,
                        "value_varchar": "UNASPIRATED"
                    },
                    {
                        "attribute": {
                            "name": "height_diff_to_ant"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
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                        "value_numeric": 7,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "calibration_date"
                        },
                        "date_from": "1999-05-17 00:00:00",
                        "date_to": "2004-07-22 00:00:00",
                        "value_date": "1999-04-01 00:00:00",
                        "value_numeric": null,
                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "temperature_sensor"
                }
            }
        },
        {
            "item": {
                "comment": "placed in the meteorological box",
                "contact_as_owner": {
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                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "IGIK",
                        "address": "Modzelewskiego 27\n02-679 Warszawa\nPoland",
                        "infos": "",
                        "name": "Institute of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@igik.edu.pl",
                    "name": "IGIK GNSS team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2005-04-15 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "sensor_model"
                        },
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                        "date_to": null,
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                        "value_numeric": null,
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                    },
                    {
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                        },
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                        "value_varchar": "LAB-EL"
                    },
                    {
                        "attribute": {
                            "name": "serial_number"
                        },
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                        "value_numeric": null,
                        "value_varchar": null
                    },
                    {
                        "attribute": {
                            "name": "data_sampling_interval"
                        },
                        "date_from": "2005-04-15 00:00:00",
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                        "value_numeric": 300,
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                    },
                    {
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                            "name": "accuracy"
                        },
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                    },
                    {
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                    },
                    {
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                        },
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                    },
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                    }
                ],
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                }
            }
        }
    ],
    "station_networks": [
        {
            "name": "EPN"
        },
        {
            "name": "EPOS"
        }
    ],
    "station_type": "GNSS Continuous"
}