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                            "name": "calibration_date"
                        },
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                    }
                ],
                "item_type": {
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                }
            }
        },
        {
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                        "abbreviation": "ASGEUPOS",
                        "address": "Zurawia 6\/12\n00-926 Warsaw\nPoland",
                        "infos": "",
                        "name": "ASG-EUPOS Management Center\r\nHead Office of Geodesy and Cartography",
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                    },
                    "comment": "",
                    "email": "asgeupos@gugik.gov.pl",
                    "name": "ASG-EUPOS Team",
                    "phone": "",
                    "role": "site_owner",
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                },
                "contact_as_producer": {
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                        "abbreviation": "ASGEUPOS",
                        "address": "Zurawia 6\/12\n00-926 Warsaw\nPoland",
                        "infos": "",
                        "name": "ASG-EUPOS Management Center\r\nHead Office of Geodesy and Cartography",
                        "www": ""
                    },
                    "comment": "",
                    "email": "biuro.eupos@gugik.gov.pl",
                    "name": "ASG-EUPOS office",
                    "phone": "+48 22 563 13 46",
                    "role": "metadata_custodian",
                    "title": ""
                },
                "date_from": "2008-07-31 00:00:00",
                "date_to": null,
                "item_attributes": [
                    {
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                            "name": "sensor_model"
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                        "date_from": "2008-07-31 00:00:00",
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                        "value_varchar": "MET4A"
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                        "date_from": "2008-07-31 00:00:00",
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                        "value_numeric": null,
                        "value_varchar": "Paroscientific Inc."
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                    {
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                ],
                "item_type": {
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        },
        {
            "name": "EPN"
        },
        {
            "name": "EPOS"
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    ],
    "station_type": "GNSS Continuous"
}