{ "cdp_num": null, "comment": null, "conditions": [ { "comments": "Located on South tower, 100 meters from GNSS\r\nantennae, transmitting in a 240 degrees sector.\r\nThe GNSS antennae are located in a 120 degrees\r\nsector not covered by the GSM system. Test at\r\n5 meters from the GSM antenna have shown no\r\ndegradation of the GPS, so it is very unlikely\r\nthat the GPS is affected.", "date_from": "1997-03-25 00:00:00", "date_to": null, "type": "radio_interferences: CELL PHONE ANTENNA" }, { "comments": "Flat roof with concrete balustrade at right\r\nangles with the roof, and several 90 degrees\r\ncorners. Medium multipath effects have been\r\nobserved.", "date_from": "1994-12-30 00:00:00", "date_to": null, "type": "multipath_sources: ROOF" }, { "comments": null, "date_from": "2011-04-15 00:00:00", "date_to": null, "type": "signal_obstructions: NONE" }, { "comments": null, "date_from": "1997-03-25 00:00:00", "date_to": null, "type": "local_episodic_effect: CELL PHONE TRANSMISSION STARTED (SEE 9.1.1)" } ], "country": "Netherlands", "country_code_ISO": "NLD", "date_from": "2002-09-04 00:00:00", "date_to": null, "description": "BRASS THREAD\/FIXED CENTERING", "geological": { "bedrock": { "condition": "FRESH", "type": "SEDIMENTARY" }, "characteristic": "SAND", "distance_to_fault": null, "fault_zone": "NO", "fracture_spacing": "UNKNOWN" }, "iers_domes": "13502M009", "instrument_collocation": [ { "comment": "EUREF Permanent Network station DELF", "date_from": "1994-12-30 00:00:00", "date_to": null, "status": "PERMANENT", "type": "GPS" }, { "comment": "IGS Permanent station DLFT", "date_from": "1998-08-17 00:00:00", "date_to": null, "status": "PERMANENT", "type": "GPS" }, { "comment": "JPL GDGPS Permenent station DLF3,\r\noperated on the same antenna\r\nthrough an antenna splitter.", "date_from": "2004-09-14 00:00:00", "date_to": null, "status": "PERMANENT", "type": "GPS" }, { "comment": "EGNOS Data Collection Network (EDCN) Permanent\r\nstation DLF5, operated on the same antenna\r\nthrough an antenna splitter.", "date_from": "2004-09-14 00:00:00", "date_to": null, "status": "PERMANENT", "type": "GPS" } ], "local_ties": [ { "accuracy": 1, "comment": "The ties are checked twice per year using a\r\nlocal survey, unless there are significant\r\nchanges the results are not reported here", "cpd_num": null, "date_at": "1994-04-19 00:00:00", "dx": -10.4112, "dy": 7.9596, "dz": 5.7753, "iers_domes": "13502M004", "name": "GPS (mark #16)", "survey_method": "TRILAT.\/TRIANG.\/LEVELLING\/GPS CAMPAIGN", "usage": "GPS DELF (EUREF)" }, { "accuracy": 1, "comment": "The ties are checked twice per year using a\r\nlocal survey, unless there are significant\r\nchanges the results are not reported here", "cpd_num": null, "date_at": "1994-04-19 00:00:00", "dx": -0.9202, "dy": 7.0236, "dz": -1.7047, "iers_domes": "13502M006", "name": "GPS (mark #20)", "survey_method": "TRILAT.\/TRIANG.\/LEVELLING\/GPS CAMPAIGN", "usage": "GPS DLFT (IGS)" } ], "location": { "city": "Delft", "coordinates": { "X": 3924697.942, "Y": 301124.893, "Z": 5001905.154, "altitude": 75.8, "lat": 51.9860181290629, "lon": 4.387458433082103 }, "country": "Netherlands", "country_iso_code": "NLD", "description": "NMI building Thijsseweg 11, 5 km South\r\nof the center of town. 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2784907", "role": "metadata_custodian", "title": "" }, "date_from": "2023-04-24 12:15:00", "date_to": null, "item_attributes": [ { "attribute": { "name": "receiver_type" }, "date_from": "2023-04-24 12:15:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "TRIMBLE ALLOY" }, { "attribute": { "name": "serial_number" }, "date_from": "2023-04-24 12:15:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "6235R40294" }, { "attribute": { "name": "satellite_system" }, "date_from": "2023-04-24 12:15:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "GPS+GLO+GAL+BDS+QZSS+SBAS" }, { "attribute": { "name": "firmware_version" }, "date_from": "2023-04-24 12:15:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "6.20" }, { "attribute": { "name": "elevation_cutoff_setting" }, "date_from": "2023-04-24 12:15:00", "date_to": null, "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "temperature_stabilization" }, "date_from": "2023-04-24 12:15:00", "date_to": null, "value_date": null, "value_numeric": 3, "value_varchar": null } ], "item_type": { "name": "receiver" } } }, { "item": { "comment": "The antenna cable run consists of a 30 m LMR400\r\noutdoors, a Huber-Suhner type 3402.17.A surge\r\nprotector, 10 m LMR400 indoors, GPS Networking\r\nInc. 4-way high-isolation antenna splitter\r\nN HI AL DCB S1X4-N\/ 12\/ 220, with 17 dB gain\r\nand 12 V DC feed to the antenna, and a short\r\n1.5 m cables to the receiver.", "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": "2011-04-15 10:00:00", "date_to": null, "item_attributes": [ { "attribute": { "name": "antenna_type" }, "date_from": "2011-04-15 10:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "LEIAR25.R3" }, { "attribute": { "name": "serial_number" }, "date_from": "2011-04-15 10:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "10030006" }, { "attribute": { "name": "antenna_reference_point" }, "date_from": "2011-04-15 10:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "BPA" }, { "attribute": { "name": "marker_arp_up_ecc" }, "date_from": "2011-04-15 10:00:00", "date_to": null, "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "marker_arp_north_ecc" }, "date_from": "2011-04-15 10:00:00", "date_to": null, "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "marker_arp_east_ecc" }, "date_from": "2011-04-15 10:00:00", "date_to": null, "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "alignment_from_true_n" }, "date_from": "2011-04-15 10:00:00", "date_to": null, "value_date": null, "value_numeric": 0, "value_varchar": null }, { "attribute": { "name": "antenna_cable_type" }, "date_from": "2011-04-15 10:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "LMR400" }, { "attribute": { "name": "antenna_cable_length" }, "date_from": "2011-04-15 10:00:00", "date_to": null, "value_date": null, "value_numeric": 41.5, "value_varchar": null } ], "item_type": { "name": "antenna" } } }, { "item": { "comment": "The antenna cable run consists of a 30 m LMR400\r\noutdoors, a Huber-Suhner type 3402.17.A surge\r\nprotector, 10 m LMR400 indoors, GPS Networking\r\nInc. 4-way high-isolation antenna splitter\r\nN HI AL DCB S1X4-N\/ 12\/ 220, with 17 dB gain\r\nand 12 V DC feed to the antenna, and a short\r\n1.5 m cables to the receiver.", "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": "2011-04-15 10:00:00", "date_to": null, "item_attributes": [ { "attribute": { "name": "radome_type" }, "date_from": "2011-04-15 10:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "LEIT" }, { "attribute": { "name": "serial_number" }, "date_from": "2011-04-15 10:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "10030006" } ], "item_type": { "name": "radome" } } }, { "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": "2011-04-15 00:00:00", "date_to": "2011-06-22 00:00:00", "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "2011-04-15 00:00:00", "date_to": "2011-06-22 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": "INTERNAL" }, { "attribute": { "name": "input_frequency" }, "date_from": "2011-04-15 00:00:00", "date_to": "2011-06-22 00:00:00", "value_date": null, "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "frequency_standard" } } }, { "item": { "comment": "Clock steering has been enabled during some\r\nperiods, and disabled during others. Currently\r\nclock steering is enabled.", "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": "2011-06-22 00:00:00", "date_to": null, "item_attributes": [ { "attribute": { "name": "standard_type" }, "date_from": "2011-06-22 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "EXTERNAL CESIUM" }, { "attribute": { "name": "input_frequency" }, "date_from": "2011-06-22 00:00:00", "date_to": null, "value_date": null, "value_numeric": 10, "value_varchar": null } ], "item_type": { "name": "frequency_standard" } } }, { "item": { "comment": "Electronics: Vaisala Humidity and Temperature\r\nTransmitter HMP233", "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": "1994-04-19 00:00:00", "date_to": null, "item_attributes": [ { "attribute": { "name": "sensor_model" }, "date_from": "1994-04-19 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "HUMICAP H-Sensor" }, { "attribute": { "name": "manufacturer" }, "date_from": "1994-04-19 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "Vaisala Oy, Finland" }, { "attribute": { "name": "serial_number" }, "date_from": "1994-04-19 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "P0120011" }, { "attribute": { "name": "data_sampling_interval" }, "date_from": "1994-04-19 00:00:00", "date_to": null, "value_date": null, "value_numeric": 60, "value_varchar": null }, { "attribute": { "name": "accuracy" }, "date_from": "1994-04-19 00:00:00", "date_to": null, "value_date": null, "value_numeric": 2, "value_varchar": null }, { "attribute": { "name": "aspiration" }, "date_from": "1994-04-19 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "NATURAL" }, { "attribute": { "name": "height_diff_to_ant" }, "date_from": "1994-04-19 00:00:00", "date_to": null, "value_date": null, "value_numeric": 1.6, "value_varchar": null }, { "attribute": { "name": "calibration_date" }, "date_from": "1994-04-19 00:00:00", "date_to": null, "value_date": "1993-09-12 00:00:00", "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "humidity_sensor" } } }, { "item": { "comment": "Electronics: Vaisala Pressure Transmitter\r\nPTB 200A; pressure sensor below GPS antenna", "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": "1994-04-14 00:00:00", "date_to": null, "item_attributes": [ { "attribute": { "name": "sensor_model" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "Vaisala Pressure Transmitter PTB 200A" }, { "attribute": { "name": "manufacturer" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "Vaisala Oy, Finland" }, { "attribute": { "name": "serial_number" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "692620" }, { "attribute": { "name": "data_sampling_interval" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": null, "value_numeric": 60, "value_varchar": null }, { "attribute": { "name": "accuracy" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": null, "value_numeric": 0.12, "value_varchar": null }, { "attribute": { "name": "height_diff_to_ant" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": null, "value_numeric": -2.65, "value_varchar": null }, { "attribute": { "name": "calibration_date" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": "1993-09-12 00:00:00", "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "pressure_sensor" } } }, { "item": { "comment": "Electronics: Vaisala Humidity and Temperature\r\nTransmitter HMP233", "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": "1994-04-14 00:00:00", "date_to": null, "item_attributes": [ { "attribute": { "name": "sensor_model" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "Pt 100 RTD 1\/3 DIN 43760B" }, { "attribute": { "name": "manufacturer" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "Vaisala Oy, Finland" }, { "attribute": { "name": "serial_number" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "P0120011" }, { "attribute": { "name": "data_sampling_interval" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": null, "value_numeric": 60, "value_varchar": null }, { "attribute": { "name": "accuracy" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": null, "value_numeric": 0.1, "value_varchar": null }, { "attribute": { "name": "aspiration" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": null, "value_numeric": null, "value_varchar": "NATURAL" }, { "attribute": { "name": "height_diff_to_ant" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": null, "value_numeric": 1.6, "value_varchar": null }, { "attribute": { "name": "calibration_date" }, "date_from": "1994-04-14 00:00:00", "date_to": null, "value_date": "1993-09-12 00:00:00", "value_numeric": null, "value_varchar": null } ], "item_type": { "name": "temperature_sensor" } } } ], "station_networks": [ { "name": "AGRS.NL" }, { "name": "EPN" }, { "name": "EPOS" }, { "name": "IGS" } ], "station_type": "GNSS Continuous" }