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"date_from": "2012-01-16 15:30:00", "date_to": "2013-02-04 14:25:00", "value_date": null, "value_numeric": null, "value_varchar": "BPA" }, { "attribute": { "name": "marker_arp_up_ecc" }, "date_from": "2012-01-16 15:30:00", "date_to": "2013-02-04 14:25:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "marker_arp_north_ecc" }, "date_from": "2012-01-16 15:30:00", "date_to": "2013-02-04 14:25:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "marker_arp_east_ecc" }, "date_from": "2012-01-16 15:30:00", "date_to": "2013-02-04 14:25:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "alignment_from_true_n" }, "date_from": "2012-01-16 15:30:00", "date_to": "2013-02-04 14:25:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "antenna_cable_type" }, "date_from": "2012-01-16 15:30:00", "date_to": "2013-02-04 14:25:00", "value_date": null, "value_numeric": null, "value_varchar": "RG 233" }, { "attribute": { "name": "antenna_cable_length" }, "date_from": "2012-01-16 15:30:00", "date_to": "2013-02-04 14:25:00", "value_date": null, "value_numeric": 60, "value_varchar": null } ], "item_type": { "name": "antenna" } } }, { "item": { "comment": "cable length not measured but estimated", "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2012-01-16 15:30:00", "date_to": "2013-02-04 14:25:00", "item_attributes": [ { "attribute": { "name": "radome_type" }, "date_from": "2012-01-16 15:30:00", "date_to": "2013-02-04 14:25:00", "value_date": null, "value_numeric": null, "value_varchar": "NONE" }, { "attribute": { "name": "serial_number" }, "date_from": "2012-01-16 15:30:00", "date_to": "2013-02-04 14:25:00", "value_date": null, "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "radome" } } }, { "item": { "comment": "Cable length not measured but estimated.\nNo changes with previous block (4.2) but the\nantenna had to be removed in order to access and\ncheck the cable connector (which was oxidized).\nCable will be replaced.", "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2013-02-04 14:45:00", "date_to": "2013-05-07 12:45:00", "item_attributes": [ { "attribute": { "name": "antenna_type" }, "date_from": "2013-02-04 14:45:00", "date_to": "2013-05-07 12:45:00", "value_date": null, "value_numeric": null, "value_varchar": "JAVRINGANT_DM" }, { "attribute": { "name": "serial_number" }, "date_from": "2013-02-04 14:45:00", "date_to": "2013-05-07 12:45:00", "value_date": null, "value_numeric": null, "value_varchar": "00573" }, { "attribute": { "name": "antenna_reference_point" }, "date_from": "2013-02-04 14:45:00", "date_to": "2013-05-07 12:45:00", "value_date": null, "value_numeric": null, "value_varchar": "BPA" }, { "attribute": { "name": "marker_arp_up_ecc" }, "date_from": "2013-02-04 14:45:00", "date_to": "2013-05-07 12:45:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "marker_arp_north_ecc" }, "date_from": "2013-02-04 14:45:00", "date_to": "2013-05-07 12:45:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "marker_arp_east_ecc" }, "date_from": "2013-02-04 14:45:00", "date_to": "2013-05-07 12:45:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "alignment_from_true_n" }, "date_from": "2013-02-04 14:45:00", "date_to": "2013-05-07 12:45:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "antenna_cable_type" }, "date_from": "2013-02-04 14:45:00", "date_to": "2013-05-07 12:45:00", "value_date": null, "value_numeric": null, "value_varchar": "RG-223" }, { "attribute": { "name": "antenna_cable_length" }, "date_from": "2013-02-04 14:45:00", "date_to": "2013-05-07 12:45:00", "value_date": null, "value_numeric": 60, "value_varchar": null } ], "item_type": { "name": "antenna" } } }, { "item": { "comment": "Cable length not measured but estimated.\nNo changes with previous block (4.2) but the\nantenna had to be removed in order to access and\ncheck the cable connector (which was oxidized).\nCable will be replaced.", "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2013-02-04 14:45:00", "date_to": "2013-05-07 12:45:00", "item_attributes": [ { "attribute": { "name": "radome_type" }, "date_from": "2013-02-04 14:45:00", "date_to": "2013-05-07 12:45:00", "value_date": null, "value_numeric": null, "value_varchar": "NONE" }, { "attribute": { "name": "serial_number" }, "date_from": "2013-02-04 14:45:00", "date_to": "2013-05-07 12:45:00", "value_date": null, "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "radome" } } }, { "item": { "comment": "Antenna is same as in previous (4.3) block.\nCable has been replaced and antenna connector\nhas been cleaned (hence antenna was removed from\nmount and re-installed afterwards).\nCable length was measured with Anritsu S332E.", "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2013-05-07 13:15:00", "date_to": "2017-12-18 12:00:00", "item_attributes": [ { "attribute": { "name": "antenna_type" }, "date_from": "2013-05-07 13:15:00", "date_to": "2017-12-18 12:00:00", "value_date": null, "value_numeric": null, "value_varchar": "JAVRINGANT_DM" }, { "attribute": { "name": "serial_number" }, "date_from": "2013-05-07 13:15:00", "date_to": "2017-12-18 12:00:00", "value_date": null, "value_numeric": null, "value_varchar": "00573" }, { "attribute": { "name": "antenna_reference_point" }, "date_from": "2013-05-07 13:15:00", "date_to": "2017-12-18 12:00:00", "value_date": null, "value_numeric": null, "value_varchar": "BPA" }, { "attribute": { "name": "marker_arp_up_ecc" }, "date_from": "2013-05-07 13:15:00", "date_to": "2017-12-18 12:00:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "marker_arp_north_ecc" }, "date_from": "2013-05-07 13:15:00", "date_to": "2017-12-18 12:00:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "marker_arp_east_ecc" }, "date_from": "2013-05-07 13:15:00", "date_to": "2017-12-18 12:00:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "alignment_from_true_n" }, "date_from": "2013-05-07 13:15:00", "date_to": "2017-12-18 12:00:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "antenna_cable_type" }, "date_from": "2013-05-07 13:15:00", "date_to": "2017-12-18 12:00:00", "value_date": null, "value_numeric": null, "value_varchar": "LMR-400" }, { "attribute": { "name": "antenna_cable_length" }, "date_from": "2013-05-07 13:15:00", "date_to": "2017-12-18 12:00:00", "value_date": null, "value_numeric": 34, "value_varchar": null } ], "item_type": { "name": "antenna" } } }, { "item": { "comment": "Antenna is same as in previous (4.3) block.\nCable has been replaced and antenna connector\nhas been cleaned (hence antenna was removed from\nmount and re-installed afterwards).\nCable length was measured with Anritsu S332E.", "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2013-05-07 13:15:00", "date_to": "2017-12-18 12:00:00", "item_attributes": [ { "attribute": { "name": "radome_type" }, "date_from": "2013-05-07 13:15:00", "date_to": "2017-12-18 12:00:00", "value_date": null, "value_numeric": null, "value_varchar": "NONE" }, { "attribute": { "name": "serial_number" }, "date_from": "2013-05-07 13:15:00", "date_to": "2017-12-18 12:00:00", "value_date": null, "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "radome" } } }, { "item": { "comment": "Installation of a surge protection device (SPD)\nExtra 1m RG58 cable from SPD to receiver", "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2017-12-18 12:00:00", "date_to": null, "item_attributes": [ { "attribute": { "name": "antenna_type" }, "date_from": "2017-12-18 12:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "JAVRINGANT_DM" }, { "attribute": { "name": "serial_number" }, "date_from": "2017-12-18 12:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "00573" }, { "attribute": { "name": "antenna_reference_point" }, "date_from": "2017-12-18 12:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "BPA" }, { "attribute": { "name": "marker_arp_up_ecc" }, "date_from": "2017-12-18 12:00:00", "date_to": null, "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "marker_arp_north_ecc" }, "date_from": "2017-12-18 12:00:00", "date_to": null, "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "marker_arp_east_ecc" }, "date_from": "2017-12-18 12:00:00", "date_to": null, "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "alignment_from_true_n" }, "date_from": "2017-12-18 12:00:00", "date_to": null, "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "antenna_cable_type" }, "date_from": "2017-12-18 12:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "LMR-400" }, { "attribute": { "name": "antenna_cable_length" }, "date_from": "2017-12-18 12:00:00", "date_to": null, "value_date": null, "value_numeric": 34, "value_varchar": null } ], "item_type": { "name": "antenna" } } }, { "item": { "comment": "Installation of a surge protection device (SPD)\nExtra 1m RG58 cable from SPD to receiver", "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2017-12-18 12:00:00", "date_to": null, "item_attributes": [ { "attribute": { "name": "radome_type" }, "date_from": "2017-12-18 12:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "NONE" }, { "attribute": { "name": "serial_number" }, "date_from": "2017-12-18 12:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "radome" } } }, { "item": { "comment": null, "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2011-11-30 00:00:00", "date_to": "2012-01-25 00:00:00", "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "2011-11-30 00:00:00", "date_to": "2012-01-25 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "INTERNAL" }, { "attribute": { "name": "input_frequency" }, "date_from": "2011-11-30 00:00:00", "date_to": "2012-01-25 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "frequency_standard" } } }, { "item": { "comment": "The 5 MHz output of the CH1-75A maser passes a\r\nHP5087A distribution amplifier and 2 times a\r\n20dB attenuator.", "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2012-01-25 00:00:00", "date_to": "2012-02-27 00:00:00", "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "2012-01-25 00:00:00", "date_to": "2012-02-27 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "EXTERNAL H MASER CH1-75A" }, { "attribute": { "name": "input_frequency" }, "date_from": "2012-01-25 00:00:00", "date_to": "2012-02-27 00:00:00", "value_date": null, "value_numeric": 5, "value_varchar": null } ], "item_type": { "name": "frequency_standard" } } }, { "item": { "comment": "As the maser was switched of for repair, it no\r\nlonger could feed the receiver with 5MHz.\r\nThe maser was restarted on 2012-03-01 but due\r\nto an issue with an attenuator, that was\r\nreplaced on 2012-11-13, the receiver was not\r\nable to lock on the external reference provided.", "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2012-02-27 00:00:00", "date_to": "2012-11-13 00:00:00", "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "2012-02-27 00:00:00", "date_to": "2012-11-13 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "INTERNAL" }, { "attribute": { "name": "input_frequency" }, "date_from": "2012-02-27 00:00:00", "date_to": "2012-11-13 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "frequency_standard" } } }, { "item": { "comment": "The 5 MHz output of the CH1-75A maser passes a\r\nHP5087A distribution amplifier and a 10dB and\r\n3dB attenuator.", "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2012-11-13 00:00:00", "date_to": "2013-12-11 00:00:00", "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "2012-11-13 00:00:00", "date_to": "2013-12-11 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "EXTERNAL H MASER CH1-75A" }, { "attribute": { "name": "input_frequency" }, "date_from": "2012-11-13 00:00:00", "date_to": "2013-12-11 00:00:00", "value_date": null, "value_numeric": 5, "value_varchar": null } ], "item_type": { "name": "frequency_standard" } } }, { "item": { "comment": "Due to an issue with the maser, the receiver is\r\nagain reconfigured to run on internal\r\noscillator.", "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2013-12-11 00:00:00", "date_to": "2017-07-31 00:00:00", "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "2013-12-11 00:00:00", "date_to": "2017-07-31 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "INTERNAL" }, { "attribute": { "name": "input_frequency" }, "date_from": "2013-12-11 00:00:00", "date_to": "2017-07-31 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "frequency_standard" } } }, { "item": { "comment": "The 5MHz output of the CH1-75A (maser3) passes\r\nan amplifier HP5087A and then is used as input\r\nto a SpectraTime femtoStepper. The output of\r\nthis phase stepper (equal to UTC(ORB)) is used\r\nas an input to the receiver.", "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2017-07-31 16:00:00", "date_to": "2023-01-23 16:00:00", "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "2017-07-31 16:00:00", "date_to": "2023-01-23 16:00:00", "value_date": null, "value_numeric": null, "value_varchar": "EXTERNAL CH1-75A MASER" }, { "attribute": { "name": "input_frequency" }, "date_from": "2017-07-31 16:00:00", "date_to": "2023-01-23 16:00:00", "value_date": null, "value_numeric": 10, "value_varchar": null } ], "item_type": { "name": "frequency_standard" } } }, { "item": { "comment": "The 10MHz output of the iMaser 3000 (maser4) is used as input to a SpectraTime femtoStepper. The output of\r\nthis phase stepper (equal to UTC(ORB)) is used\r\nas an input to the receiver.\r\nRefDLY: 69.9 ns", "contact_as_owner": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "ROB", "address": "Avenue Circulaire 3\n1180 Uccle\nBelgium", "infos": "", "name": "Royal Observatory of Belgium", "www": "http:\/\/gnss.be\/" }, "comment": "", "email": "time_lab@oma.be", "name": "gnss_time", "phone": "", "role": "metadata_custodian", "title": "" }, "date_from": "2023-01-23 16:00:00", "date_to": null, "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "2023-01-23 16:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "EXTERNAL iMaser 3000 Maser" }, { "attribute": { "name": "input_frequency" }, "date_from": "2023-01-23 16:00:00", "date_to": null, "value_date": null, "value_numeric": 10, "value_varchar": null } ], "item_type": { "name": "frequency_standard" } } } ], "station_networks": [], "station_type": "GNSS Continuous" }