{ "cdp_num": null, "comment": "The GPS receiver is located at the site of the former Kootwijk Observatory for Satellite Geodesy (KOSG). The buildings at the site were vacated and pulled down in 2005, with the exception of the GPS mast. Since 28 August 2008 the receiver is running under solar power. The receiver is operating under responsibility of the Department of Earth Observation (DEOS) of the Delft University of Technology. The steel GPS mast has been in place since January\r\n1991 (exact date unknown).\r\nAs the position of KOSG was not stable, due to ailing antenna,KOSG has been decommissioned and received the status of 'former EPN station' retro-actively since the last antenna change on Sept. 13, 2011 (GPS week No 1653). See EUREF mail Number 7013. Data is still available for this period but users are advised the data is unreliable. On 2013-06-27 the station operators stopped submitting data to IGS and EPN data centers for KOSG, though the data is still available through the local data center until 2015. On 2013-06-18 a new station and marker were installed on the same site, called KOS1, just 750 meters from the old station.", "conditions": [ { "comments": null, "date_from": "2003-03-17 00:00:00", "date_to": "2003-03-17 00:00:00", "type": "local_episodic_effect: On March 17, 2003, about 8:00 UTC, a guy wire steadying the antenna mast was hit by a JCB,resulting in a shift of the antenna position.Two different analysis of the GPS data show the following shifts: -0.0082 in N and -0.0021in E (EPN timeseries by Ambrus Keyneres),respectively -0.0083 in N and -0.0033 in EJPL timeseries). Local measurements indicate a shift of 5 mm to the South" }, { "comments": null, "date_from": "2008-07-17 00:00:00", "date_to": "2008-07-17 00:00:00", "type": "local_episodic_effect: MINOR CONSTRUCTION (FOUNDATION FOR SOLAR PANELS)" }, { "comments": null, "date_from": "2010-04-01 00:00:00", "date_to": "2011-11-28 00:00:00", "type": "local_episodic_effect: The receiver has been experiencing increasing loss-of-locks in a very regular repeating pattern. The problems started already in early 2010 but were for the first time noted in Feb.2011 after which the situation gradually worsened. The loss-of-locks occur in a very systematic pattern whereby the number of loss-of-locks is steadily increasing over time.A plot of this phenomena is available on request. The cause of this problem remains a mystery. The problem disappeared at the end of 2011 after the receiver was moved to Delft for testing." }, { "comments": null, "date_from": "2011-07-20 00:00:00", "date_to": "2011-11-28 00:00:00", "type": "local_episodic_effect: Data started to deteriorate, frequentloss-of-lock, bad station repeatability,possibly related to badly connected radome,antenna damage or faulty receiver. Use thisdata only with extreme caution." }, { "comments": null, "date_from": "2011-11-28 00:00:00", "date_to": "2012-04-23 00:00:00", "type": "local_episodic_effect: Observations were stopped because of powerproblems and bad data quality, observations were resumed on 2012-04-23 late afternoon." } ], "country": "Netherlands", "country_code_ISO": "NLD", "date_from": "1991-01-01 00:00:00", "date_to": "2015-11-27 11:00:00", "description": "BRASS NAIL", "geological": { "bedrock": { "condition": null, "type": "SEDIMENTARY" }, "characteristic": "SAND, GLACIAL DEPOSIT", "distance_to_fault": null, "fault_zone": "NO", "fracture_spacing": null }, "iers_domes": "13504M003", "instrument_collocation": [ { "comment": "", "date_from": "1973-01-01 00:00:00", "date_to": null, "status": "MOBILE", "type": "ABSOLUTE GRAVIMETERS" }, { "comment": "", "date_from": "1973-01-01 00:00:00", "date_to": null, "status": "MOBILE", "type": "RELATIVE GRAVIMETERS" }, { "comment": "", "date_from": "1973-01-01 00:00:00", "date_to": "1995-12-31 00:00:00", "status": "PERMANENT", "type": "SEISMOMETER" }, { "comment": "Regular occupations by MTLRS-2", "date_from": "1984-01-01 00:00:00", "date_to": "1996-12-31 00:00:00", "status": "MOBILE", "type": "SLR" } ], "local_ties": [ { "accuracy": 3, "comment": "KOSG-23 Mobile SLR Reference Point", "cpd_num": "8833", "date_at": "1993-04-14 00:00:00", "dx": 12.458, "dy": 37.501, "dz": -23.025, "iers_domes": "13504M002", "name": "KOSG-23(SLR)", "survey_method": "GPS CAMPAIGN\/TRILATERATION\/TRIANGULATION", "usage": "SLR\/LOCAL CONTROL\/FOOTPRINT" }, { "accuracy": 3, "comment": "KOSG-28 Mobile GPS Reference Point, also\r\nEUREF reference marker", "cpd_num": "8833", "date_at": "1993-04-14 00:00:00", "dx": -17.115, "dy": 32.379, "dz": 1.144, "iers_domes": "13504M002", "name": "KOSG-28", "survey_method": "GPS CAMPAIGN\/TRILATERATION\/TRIANGULATION", "usage": "LOCAL CONTROL\/FOOTPRINT\/GPS" }, { "accuracy": 5, "comment": "Provisional result from GPS data, local survey\r\nwith triangulation, trilateration and levelling\r\nhas been conducted. Results are pending.", "cpd_num": null, "date_at": "2013-06-23 00:00:00", "dx": 388.53, "dy": 630.93, "dz": -339.58, "iers_domes": "13504M005", "name": "KOS1", "survey_method": "GPS", "usage": "GNSS" } ], "location": { "city": "Kootwijk", "coordinates": { "X": 3899225.273, "Y": 396731.801, "Z": 5015078.332, "altitude": 96.9, "lat": 52.17842530273931, "lon": 5.80964170667664 }, "country": "Netherlands", "country_iso_code": "NLD", "description": "Near Apeldoorn", "state": "Gelderland", "tectonic": { "plate_name": "EURASIAN" } }, "logs": { "contact": "TU Delft GNSS team (gnss-citg@tudelft.nl)", "date": "2023-04-17 00:00:00", "log_type": "UPDATE", "modified": "UNAVAILABLE", "previous": "UNAVAILABLE", "title": "KOSG00NLD.xml" }, "marker": "KOSG", "monument": { "description": "STEEL MAST", "foundation": "CONCRETE BLOCK", "foundation_depth": null, "height": 12, "monument_inscription": "KOSG-25" }, "monument_num": 0, "name": "Kootwijk Observatory for Satellite Geodesy", "receiver_num": 0, 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Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2000-11-27 15:16:00", "date_to": "2008-08-28 08:00:00", "item_attributes": [ { "attribute": { "name": "receiver_type" }, "date_from": "2000-11-27 15:16:00", "date_to": "2008-08-28 08:00:00", "value_date": null, "value_numeric": null, "value_varchar": "AOA SNR-12 ACT" }, { "attribute": { "name": "serial_number" }, "date_from": "2000-11-27 15:16:00", "date_to": "2008-08-28 08:00:00", "value_date": null, "value_numeric": null, "value_varchar": "229" }, { "attribute": { "name": "satellite_system" }, "date_from": "2000-11-27 15:16:00", "date_to": "2008-08-28 08:00:00", "value_date": null, "value_numeric": null, "value_varchar": "GPS" }, { "attribute": { "name": "firmware_version" }, "date_from": "2000-11-27 15:16:00", "date_to": "2008-08-28 08:00:00", "value_date": null, "value_numeric": null, 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], "item_type": { "name": "receiver" } } }, { "item": { "comment": "Firmware update", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2009-04-17 15:04:00", "date_to": "2009-05-19 09:15:00", "item_attributes": [ { "attribute": { "name": "receiver_type" }, "date_from": "2009-04-17 15:04:00", "date_to": "2009-05-19 09:15:00", "value_date": null, "value_numeric": null, 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"item_type": { "name": "receiver" } } }, { "item": { "comment": "Firmware update", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2009-05-19 09:15:00", "date_to": "2010-03-20 14:30:00", "item_attributes": [ { "attribute": { "name": "receiver_type" }, "date_from": "2009-05-19 09:15:00", "date_to": "2010-03-20 14:30:00", "value_date": null, "value_numeric": null, "value_varchar": "LEICA GRX1200GGPRO" }, { "attribute": { "name": "serial_number" }, "date_from": "2009-05-19 09:15:00", "date_to": "2010-03-20 14:30:00", "value_date": null, "value_numeric": null, "value_varchar": "356091" }, { "attribute": { "name": "satellite_system" }, "date_from": "2009-05-19 09:15:00", "date_to": "2010-03-20 14:30:00", "value_date": null, "value_numeric": null, "value_varchar": "GPS+GLO" }, { "attribute": { "name": "firmware_version" }, "date_from": "2009-05-19 09:15:00", "date_to": "2010-03-20 14:30:00", "value_date": null, "value_numeric": null, "value_varchar": "7.50\/3.017" }, { "attribute": { "name": "elevation_cutoff_setting" }, "date_from": "2009-05-19 09:15:00", "date_to": "2010-03-20 14:30:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "temperature_stabilization" }, "date_from": "2009-05-19 09:15:00", "date_to": "2010-03-20 14:30:00", "value_date": null, "value_numeric": null, "value_varchar": "NaN" } ], "item_type": { "name": "receiver" } } }, { "item": { "comment": "Firmware update", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2010-03-20 14:30:00", "date_to": "2010-04-30 21:10:00", "item_attributes": [ { "attribute": { "name": "receiver_type" }, "date_from": "2010-03-20 14:30:00", "date_to": "2010-04-30 21:10:00", "value_date": null, "value_numeric": null, "value_varchar": "LEICA GRX1200GGPRO" }, { "attribute": { "name": "serial_number" }, "date_from": "2010-03-20 14:30:00", "date_to": "2010-04-30 21:10:00", "value_date": null, "value_numeric": null, "value_varchar": "356091" }, { "attribute": { "name": "satellite_system" }, "date_from": "2010-03-20 14:30:00", "date_to": "2010-04-30 21:10:00", "value_date": null, "value_numeric": null, "value_varchar": "GPS+GLO" }, { "attribute": { "name": "firmware_version" }, "date_from": "2010-03-20 14:30:00", "date_to": "2010-04-30 21:10:00", "value_date": null, "value_numeric": null, "value_varchar": "7.80\/3.018" }, { "attribute": { "name": "elevation_cutoff_setting" }, "date_from": "2010-03-20 14:30:00", "date_to": "2010-04-30 21:10:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "temperature_stabilization" }, "date_from": "2010-03-20 14:30:00", "date_to": "2010-04-30 21:10:00", "value_date": null, "value_numeric": null, "value_varchar": "NaN" } ], "item_type": { "name": "receiver" } } }, { "item": { "comment": "Firmware update", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2010-04-30 21:10:00", "date_to": "2011-05-20 16:15:00", "item_attributes": [ { "attribute": { "name": "receiver_type" }, "date_from": "2010-04-30 21:10:00", "date_to": "2011-05-20 16:15:00", "value_date": null, "value_numeric": null, "value_varchar": "LEICA GRX1200GGPRO" }, { "attribute": { "name": "serial_number" }, "date_from": "2010-04-30 21:10:00", "date_to": "2011-05-20 16:15:00", "value_date": null, "value_numeric": null, "value_varchar": "356091" }, { "attribute": { "name": "satellite_system" }, "date_from": "2010-04-30 21:10:00", "date_to": "2011-05-20 16:15:00", "value_date": null, "value_numeric": null, "value_varchar": "GPS+GLO" }, { "attribute": { "name": "firmware_version" }, "date_from": "2010-04-30 21:10:00", "date_to": "2011-05-20 16:15:00", "value_date": null, "value_numeric": null, "value_varchar": "7.80\/3.019" }, { "attribute": { "name": "elevation_cutoff_setting" }, "date_from": "2010-04-30 21:10:00", "date_to": "2011-05-20 16:15:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "temperature_stabilization" }, "date_from": "2010-04-30 21:10:00", "date_to": "2011-05-20 16:15:00", "value_date": null, "value_numeric": null, "value_varchar": "NaN" } ], "item_type": { "name": "receiver" } } }, { "item": { "comment": "Receiver removed for off-site testing", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2011-05-20 16:15:00", "date_to": "2011-11-28 14:02:00", "item_attributes": [ { "attribute": { "name": "receiver_type" }, "date_from": "2011-05-20 16:15:00", "date_to": "2011-11-28 14:02:00", "value_date": null, "value_numeric": null, "value_varchar": "LEICA GRX1200GGPRO" }, { "attribute": { "name": "serial_number" }, "date_from": "2011-05-20 16:15:00", "date_to": "2011-11-28 14:02:00", "value_date": null, "value_numeric": null, "value_varchar": "356091" }, { "attribute": { "name": "satellite_system" }, "date_from": "2011-05-20 16:15:00", "date_to": "2011-11-28 14:02:00", "value_date": null, "value_numeric": null, "value_varchar": "GPS+GLO" }, { "attribute": { "name": "firmware_version" }, "date_from": "2011-05-20 16:15:00", "date_to": "2011-11-28 14:02:00", "value_date": null, "value_numeric": null, "value_varchar": "8.20\/3.019" }, { "attribute": { "name": "elevation_cutoff_setting" }, "date_from": "2011-05-20 16:15:00", "date_to": "2011-11-28 14:02:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "temperature_stabilization" }, "date_from": "2011-05-20 16:15:00", "date_to": "2011-11-28 14:02:00", "value_date": null, "value_numeric": null, "value_varchar": "NaN" } ], "item_type": { "name": "receiver" } } }, { "item": { "comment": "Receiver reinstalled", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2012-04-23 14:00:00", "date_to": "2015-11-27 11:00:00", "item_attributes": [ { "attribute": { "name": "receiver_type" }, "date_from": "2012-04-23 14:00:00", "date_to": "2015-11-27 11:00:00", "value_date": 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"value_varchar": "NaN" } ], "item_type": { "name": "receiver" } } }, { "item": { "comment": "Model C146-6-1\r\nDUT design (polyester cone)\r\nPower and Signal cable separated, power submitted by original GPS-receiver ROGUE SNR-8, and later batteries", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "1991-01-01 00:00:00", "date_to": "2011-07-20 00:00:00", "item_attributes": [ { "attribute": { "name": "antenna_type" }, "date_from": "1991-01-01 00:00:00", "date_to": "2011-07-20 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "AOAD\/M_B" }, { "attribute": { "name": "serial_number" }, "date_from": "1991-01-01 00:00:00", "date_to": "2011-07-20 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "119" }, { "attribute": { "name": "antenna_reference_point" }, "date_from": "1991-01-01 00:00:00", "date_to": "2011-07-20 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "BCR" }, { "attribute": { "name": "marker_arp_up_ecc" }, "date_from": "1991-01-01 00:00:00", "date_to": "2011-07-20 00:00:00", "value_date": null, "value_numeric": 0.105, "value_varchar": null }, { "attribute": { "name": "marker_arp_north_ecc" }, "date_from": "1991-01-01 00:00:00", "date_to": "2011-07-20 00:00:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "marker_arp_east_ecc" }, "date_from": "1991-01-01 00:00:00", "date_to": "2011-07-20 00:00:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "alignment_from_true_n" }, "date_from": "1991-01-01 00:00:00", "date_to": "2011-07-20 00:00:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "antenna_cable_type" }, "date_from": "1991-01-01 00:00:00", "date_to": "2011-07-20 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": null }, { "attribute": { "name": "antenna_cable_length" }, "date_from": "1991-01-01 00:00:00", "date_to": "2011-07-20 00:00:00", "value_date": null, "value_numeric": 30, "value_varchar": null } ], "item_type": { "name": "antenna" } } }, { "item": { "comment": "Model C146-6-1\r\nDUT design (polyester cone)\r\nPower and Signal cable separated, power submitted by original GPS-receiver ROGUE SNR-8, and later batteries", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "1991-01-01 00:00:00", "date_to": "2011-07-20 00:00:00", "item_attributes": [ { "attribute": { "name": "radome_type" }, "date_from": "1991-01-01 00:00:00", "date_to": "2011-07-20 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "DUTD" }, { "attribute": { "name": "serial_number" }, "date_from": "1991-01-01 00:00:00", "date_to": "2011-07-20 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "119" } ], "item_type": { "name": "radome" } } }, { "item": { "comment": "On 18 Sep 2011 it was discovered that the radome has fallen off the station. The exact date and time that the Radome fell off is unknown, but from the inspection of the timeseries we believe it fell off on 12 Sep 2011. However, there may have been a prolonged period when the dome was only loosely connected resulting in rather unstable coordinate time series. We believe this started on June 20 2011, although there is also some increased scatter in the period leading up to this date (starting end of March).", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2011-07-20 00:00:00", "date_to": "2011-09-13 00:00:00", "item_attributes": [ { "attribute": { "name": "antenna_type" }, "date_from": "2011-07-20 00:00:00", "date_to": "2011-09-13 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "AOAD\/M_B" }, { "attribute": { "name": "serial_number" }, "date_from": "2011-07-20 00:00:00", "date_to": "2011-09-13 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "119" }, { "attribute": { "name": "antenna_reference_point" }, "date_from": "2011-07-20 00:00:00", "date_to": "2011-09-13 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "BCR" }, { "attribute": { "name": "marker_arp_up_ecc" }, "date_from": "2011-07-20 00:00:00", "date_to": "2011-09-13 00:00:00", "value_date": null, "value_numeric": 0.105, "value_varchar": null }, { "attribute": { "name": "marker_arp_north_ecc" }, "date_from": "2011-07-20 00:00:00", "date_to": "2011-09-13 00:00:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "marker_arp_east_ecc" }, "date_from": "2011-07-20 00:00:00", "date_to": "2011-09-13 00:00:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "alignment_from_true_n" }, "date_from": "2011-07-20 00:00:00", "date_to": "2011-09-13 00:00:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "antenna_cable_type" }, "date_from": "2011-07-20 00:00:00", "date_to": "2011-09-13 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": null }, { "attribute": { "name": "antenna_cable_length" }, "date_from": "2011-07-20 00:00:00", "date_to": "2011-09-13 00:00:00", "value_date": null, "value_numeric": 30, "value_varchar": null } ], "item_type": { "name": "antenna" } } }, { "item": { "comment": "On 18 Sep 2011 it was discovered that the radome has fallen off the station. The exact date and time that the Radome fell off is unknown, but from the inspection of the timeseries we believe it fell off on 12 Sep 2011. However, there may have been a prolonged period when the dome was only loosely connected resulting in rather unstable coordinate time series. We believe this started on June 20 2011, although there is also some increased scatter in the period leading up to this date (starting end of March).", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2011-07-20 00:00:00", "date_to": "2011-09-13 00:00:00", "item_attributes": [ { "attribute": { "name": "radome_type" }, "date_from": "2011-07-20 00:00:00", "date_to": "2011-09-13 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "UNKN" }, { "attribute": { "name": "serial_number" }, "date_from": "2011-07-20 00:00:00", "date_to": "2011-09-13 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "radome" } } }, { "item": { "comment": "Model C146-6-1\r\nPower and Signal cable separated, power submitted by batteries\r\nThe antenna itself remains unaltered since 1991. The antenna was removed from March 2016.", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2011-09-13 00:00:00", "date_to": "2016-03-08 12:00:00", "item_attributes": [ { "attribute": { "name": "antenna_type" }, "date_from": "2011-09-13 00:00:00", "date_to": "2016-03-08 12:00:00", "value_date": null, "value_numeric": null, "value_varchar": "AOAD\/M_B" }, { "attribute": { "name": "serial_number" }, "date_from": "2011-09-13 00:00:00", "date_to": "2016-03-08 12:00:00", "value_date": null, "value_numeric": null, "value_varchar": "119" }, { "attribute": { "name": "antenna_reference_point" }, "date_from": "2011-09-13 00:00:00", "date_to": "2016-03-08 12:00:00", "value_date": null, "value_numeric": null, "value_varchar": "BCR" }, { "attribute": { "name": "marker_arp_up_ecc" }, "date_from": "2011-09-13 00:00:00", "date_to": "2016-03-08 12:00:00", "value_date": null, "value_numeric": 0.105, "value_varchar": null }, { "attribute": { "name": "marker_arp_north_ecc" }, "date_from": "2011-09-13 00:00:00", "date_to": "2016-03-08 12:00:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "marker_arp_east_ecc" }, "date_from": "2011-09-13 00:00:00", "date_to": "2016-03-08 12:00:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "alignment_from_true_n" }, "date_from": "2011-09-13 00:00:00", "date_to": "2016-03-08 12:00:00", "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "antenna_cable_type" }, "date_from": "2011-09-13 00:00:00", "date_to": "2016-03-08 12:00:00", "value_date": null, "value_numeric": null, "value_varchar": null }, { "attribute": { "name": "antenna_cable_length" }, "date_from": "2011-09-13 00:00:00", "date_to": "2016-03-08 12:00:00", "value_date": null, "value_numeric": 30, "value_varchar": null } ], "item_type": { "name": "antenna" } } }, { "item": { "comment": "Model C146-6-1\r\nPower and Signal cable separated, power submitted by batteries\r\nThe antenna itself remains unaltered since 1991. The antenna was removed from March 2016.", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2011-09-13 00:00:00", "date_to": "2016-03-08 12:00:00", "item_attributes": [ { "attribute": { "name": "radome_type" }, "date_from": "2011-09-13 00:00:00", "date_to": "2016-03-08 12:00:00", "value_date": null, "value_numeric": null, "value_varchar": "NONE" }, { "attribute": { "name": "serial_number" }, "date_from": "2011-09-13 00:00:00", "date_to": "2016-03-08 12:00:00", "value_date": null, "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "radome" } } }, { "item": { "comment": "5065A Rubidium Vapor Frequency Standard", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "1991-01-01 00:00:00", "date_to": "1996-01-26 00:00:00", "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "1991-01-01 00:00:00", "date_to": "1996-01-26 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "EXTERNAL RUBIDIUM" }, { "attribute": { "name": "input_frequency" }, "date_from": "1991-01-01 00:00:00", "date_to": "1996-01-26 00:00:00", "value_date": null, "value_numeric": 5, "value_varchar": null } ], "item_type": { "name": "frequency_standard" } } }, { "item": { "comment": "Frequency Crystal Oscillator", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "1996-01-27 00:00:00", "date_to": "1996-02-14 00:00:00", "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "1996-01-27 00:00:00", "date_to": "1996-02-14 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "EXTERNAL QUARTZ" }, { "attribute": { "name": "input_frequency" }, "date_from": "1996-01-27 00:00:00", "date_to": "1996-02-14 00:00:00", "value_date": null, "value_numeric": 5, "value_varchar": null } ], "item_type": { "name": "frequency_standard" } } }, { "item": { "comment": "5065A Rubidium Vapor Frequency Standard", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "1996-02-14 00:00:00", "date_to": "2000-11-23 00:00:00", "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "1996-02-14 00:00:00", "date_to": "2000-11-23 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "EXTERNAL RUBIDIUM" }, { "attribute": { "name": "input_frequency" }, "date_from": "1996-02-14 00:00:00", "date_to": "2000-11-23 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": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2000-11-24 00:00:00", "date_to": "2000-11-27 00:00:00", "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "2000-11-24 00:00:00", "date_to": "2000-11-27 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "INTERNAL" }, { "attribute": { "name": "input_frequency" }, "date_from": "2000-11-24 00:00:00", "date_to": "2000-11-27 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "frequency_standard" } } }, { "item": { "comment": "OSCILLOQUARTZ Oven Controlled Crystal Oscillator\r\nOCXO 8600", "contact_as_owner": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2000-11-27 00:00:00", "date_to": "2008-08-27 00:00:00", "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "2000-11-27 00:00:00", "date_to": "2008-08-27 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "EXTERNAL QUARTZ" }, { "attribute": { "name": "input_frequency" }, "date_from": "2000-11-27 00:00:00", "date_to": "2008-08-27 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": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "site_owner", "title": "" }, "contact_as_producer": { "agency": { "abbreviation": "DUT", "address": "Stevinweg 1\n2628 CN Delft\nNetherlands (the)", "infos": "", "name": "Delft University of Technology", "www": "" }, "comment": "", "email": "gnss-citg@tudelft.nl", "name": "TU Delft GNSS team", "phone": "+31 15 2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2008-08-28 00:00:00", "date_to": null, "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "2008-08-28 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "INTERNAL" }, { "attribute": { "name": "input_frequency" }, "date_from": "2008-08-28 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "frequency_standard" } } } ], "station_networks": [ { "name": "AGRS.NL" }, { "name": "EPN" }, { "name": "EPOS" }, { "name": "IGS" } ], "station_type": "GNSS Continuous" }