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                    {
                        "attribute": {
                            "name": "satellite_system"
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                        "date_from": "2013-11-12 07:48:00",
                        "date_to": "2017-10-19 08:00:00",
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                        "value_numeric": null,
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                    },
                    {
                        "attribute": {
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                        "date_to": "2017-10-19 08:00:00",
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                            "name": "temperature_stabilization"
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                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": null,
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                    "agency": {
                        "abbreviation": "MAO",
                        "address": "Academician Zabolotny Street 27\n03143 Kiev\nUkraine",
                        "infos": "",
                        "name": "Main Astronomical Observatory of the National Academy of Sciences of Ukraine",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "MAO",
                        "address": "Academician Zabolotny Street 27\n03143 Kiev\nUkraine",
                        "infos": "",
                        "name": "Main Astronomical Observatory of the National Academy of Sciences of Ukraine",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2022-05-24 00:00:00",
                "date_to": "2024-06-13 09:20:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
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                        "date_from": "2022-05-24 00:00:00",
                        "date_to": "2024-06-13 09:20:00",
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                    {
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                    {
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                        "attribute": {
                            "name": "temperature_stabilization"
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                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
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            }
        },
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            "item": {
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                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "MAO",
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                    },
                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "MAO",
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                    },
                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2024-06-13 09:20:00",
                "date_to": "2025-02-01 02:30:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
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                        "date_to": "2025-02-01 02:30:00",
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                        "attribute": {
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                        "attribute": {
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                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": "The receiver is provided by the Lviv Polytechnic National University (Lviv, Ukraine).",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "MAO",
                        "address": "Academician Zabolotny Street 27\n03143 Kiev\nUkraine",
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                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
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                        "infos": "",
                        "name": "Main Astronomical Observatory of the National Academy of Sciences of Ukraine",
                        "www": ""
                    },
                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2025-03-26 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "receiver_type"
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                        "date_to": null,
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                        "value_numeric": null,
                        "value_varchar": "TRIMBLE BD970"
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                    {
                        "attribute": {
                            "name": "serial_number"
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                            "name": "elevation_cutoff_setting"
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                        "attribute": {
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                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "receiver"
                }
            }
        },
        {
            "item": {
                "comment": "There is not a north point on the Choke Rings\r\nantenna (TRM29659.00).",
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                    "agency": {
                        "abbreviation": "MAO",
                        "address": "Academician Zabolotny Street 27\n03143 Kiev\nUkraine",
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                    },
                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
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                "contact_as_producer": {
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                        "abbreviation": "MAO",
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                    },
                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
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                "date_to": "2010-12-20 06:10:00",
                "item_attributes": [
                    {
                        "attribute": {
                            "name": "antenna_type"
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                        "value_numeric": null,
                        "value_varchar": "85216"
                    },
                    {
                        "attribute": {
                            "name": "antenna_reference_point"
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                        "value_numeric": null,
                        "value_varchar": "BPA"
                    },
                    {
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                            "name": "marker_arp_north_ecc"
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                        "value_numeric": 0,
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                    {
                        "attribute": {
                            "name": "marker_arp_east_ecc"
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                    },
                    {
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                            "name": "alignment_from_true_n"
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                    {
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                            "name": "antenna_cable_type"
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                    {
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                            "name": "antenna_cable_length"
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                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": "There is not a north point on the Choke Rings\r\nantenna (TRM29659.00).",
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                    "agency": {
                        "abbreviation": "MAO",
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                    },
                    "comment": "",
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                    "name": "MAO GNSS Team",
                    "phone": "",
                    "role": "site_owner",
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                "contact_as_producer": {
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                    },
                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
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                "item_attributes": [
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                        "attribute": {
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                        "value_varchar": null
                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
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                        "abbreviation": "MAO",
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                    },
                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
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                    "role": "site_owner",
                    "title": ""
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                "contact_as_producer": {
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                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
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                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2010-12-20 11:40:00",
                "date_to": "2012-11-07 09:00:00",
                "item_attributes": [
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                        "attribute": {
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                    {
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                    {
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                    },
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                    },
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                    },
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                    },
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                    },
                    {
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                    }
                ],
                "item_type": {
                    "name": "antenna"
                }
            }
        },
        {
            "item": {
                "comment": "There is not a north point on the NOV702GG\r\nantenna. The antenna connector is used as\r\nthe reference point.",
                "contact_as_owner": {
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                        "abbreviation": "MAO",
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                        "infos": "",
                        "name": "Main Astronomical Observatory of the National Academy of Sciences of Ukraine",
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                    },
                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
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                    },
                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
                    "phone": "",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2010-12-20 11:40:00",
                "date_to": "2012-11-07 09:00:00",
                "item_attributes": [
                    {
                        "attribute": {
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                    },
                    {
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                    }
                ],
                "item_type": {
                    "name": "radome"
                }
            }
        },
        {
            "item": {
                "comment": "There is not a north point on the NOV702GG\r\nantenna. The antenna connector is used as\r\nthe reference point.",
                "contact_as_owner": {
                    "agency": {
                        "abbreviation": "MAO",
                        "address": "Academician Zabolotny Street 27\n03143 Kiev\nUkraine",
                        "infos": "",
                        "name": "Main Astronomical Observatory of the National Academy of Sciences of Ukraine",
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                    },
                    "comment": "",
                    "email": "gnss@mao.kiev.ua",
                    "name": "MAO GNSS Team",
                    "phone": "",
                    "role": "site_owner",
                    "title": ""
                },
                "contact_as_producer": {
                    "agency": {
                        "abbreviation": "MAO",
                        "address": "Academician Zabolotny Street 27\n03143 Kiev\nUkraine",
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                ],
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            }
        },
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                ],
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                "date_to": "2025-02-01 02:30:00",
                "item_attributes": [
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                    }
                ],
                "item_type": {
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                }
            }
        },
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                    "role": "metadata_custodian",
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                    }
                ],
                "item_type": {
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                }
            }
        },
        {
            "item": {
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                ],
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        },
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        {
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        {
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}