KOSG00NLD Site Information Form (site log) International GNSS Service See Instructions at: https://files.igs.org/pub/station/general/sitelog_instr.txt 0. Form Prepared by (full name) : TU Delft GNSS team (gnss-citg@tudelft.nl) Date Prepared : 2023-04-17 Report Type : UPDATE If Update: Previous Site Log : kosg00nld_20160307.log Modified/Added Sections : 11 1. Site Identification of the GNSS Monument Site Name : Kootwijk Observatory for Satellite Geodesy Four Character ID : KOSG Monument Inscription : KOSG-25 IERS DOMES Number : 13504M003 CDP Number : (A4) Monument Description : STEEL MAST Height of the Monument : 12 m Monument Foundation : CONCRETE BLOCK Foundation Depth : (m) Marker Description : BRASS NAIL Date Installed : 1991-01-01 Geologic Characteristic : SAND, GLACIAL DEPOSIT Bedrock Type : SEDIMENTARY Bedrock Condition : (FRESH/JOINTED/WEATHERED) Fracture Spacing : (0 cm/1-10 cm/11-50 cm/51-200 cm/over 200 cm) Fault zones nearby : NO Distance/activity : (multiple lines) Additional Information : 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 : 1991 (exact date unknown). : As 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. 2. Site Location Information City or Town : Kootwijk State or Province : Gelderland Country : Netherlands (the) Tectonic Plate : EURASIAN Approximate Position (ITRF) X coordinate (m) : 3899225.273 Y coordinate (m) : 396731.801 Z coordinate (m) : 5015078.332 Latitude (N is +) : +521042.33 Longitude (E is +) : +0054834.71 Elevation (m,ellips.) : 96.9 Additional Information : Near Apeldoorn 3. GNSS Receiver Information 3.1 Receiver Type : ROGUE SNR-8 Satellite System : GPS Serial Number : R117 Firmware Version : Meenix 7.8 Elevation Cutoff Setting : 5 deg Date Installed : 1994-06-13 Date Removed : 1994-08-23 Temperature Stabiliz. : 20.0 +/- 2.0 Additional Information : (multiple lines) 3.2 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : T175 Firmware Version : 2.8 Elevation Cutoff Setting : 5 deg Date Installed : 1994-08-24 Date Removed : 1994-11-22 Temperature Stabiliz. : 20.0 +/- 2.0 Additional Information : (multiple lines) 3.3 Receiver Type : ROGUE SNR-8 Satellite System : GPS Serial Number : R117 Firmware Version : Meenix 7.8 Elevation Cutoff Setting : 0 deg Date Installed : 1994-11-23 Date Removed : 1996-01-25 Temperature Stabiliz. : 20.0 +/- 2.0 Additional Information : (multiple lines) 3.4 Receiver Type : ROGUE SNR-12 RM Satellite System : GPS Serial Number : T209 Firmware Version : 3.2.32.1 Elevation Cutoff Setting : 0 deg Date Installed : 1996-01-26 Date Removed : 1996-04-23 Temperature Stabiliz. : 20.0 +/- 2.0 Additional Information : (multiple lines) 3.5 Receiver Type : ROGUE SNR-12 RM Satellite System : GPS Serial Number : T229 Firmware Version : 3.2.32.1 Elevation Cutoff Setting : 0 deg Date Installed : 1996-04-24 Date Removed : 1999-02-28 Temperature Stabiliz. : 20.0 +/- 2.0 Additional Information : (multiple lines) 3.6 Receiver Type : ROGUE SNR-12 RM Satellite System : GPS Serial Number : T222 Firmware Version : 3.2.32.1 Elevation Cutoff Setting : 0 deg Date Installed : 1999-03-01 Date Removed : 1999-07-14T07:00Z Temperature Stabiliz. : 20.0 +/- 2.0 Additional Information : (multiple lines) 3.7 Receiver Type : ROGUE SNR-12 RM Satellite System : GPS Serial Number : T222 Firmware Version : 3.2.32.9 Elevation Cutoff Setting : 0 deg Date Installed : 1999-07-14T07:10Z Date Removed : 2000-11-23T00:00Z Temperature Stabiliz. : 20.0 +/- 2.0 Additional Information : (multiple lines) 3.8 Receiver Type : AOA SNR-12 ACT Satellite System : GPS Serial Number : 224 Firmware Version : 3.3.32.4 Elevation Cutoff Setting : 0 deg Date Installed : 2000-11-24T17:34Z Date Removed : 2000-11-26T00:00Z Temperature Stabiliz. : 20.0 +/- 2.0 Additional Information : (multiple lines) 3.9 Receiver Type : AOA SNR-12 ACT Satellite System : GPS Serial Number : 229 Firmware Version : 3.3.32.4 Elevation Cutoff Setting : 0 deg Date Installed : 2000-11-27T15:16Z Date Removed : 2008-08-28T08:00Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.10 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 356091 Firmware Version : 6.00/3.14 Elevation Cutoff Setting : 0 deg Date Installed : 2008-08-28T13:00Z Date Removed : 2009-04-17T14:45Z Temperature Stabiliz. : none Additional Information : The receiver has actually been installed on : 2008-07-31T08:00Z and has been collecting data : in parallel to KOSG as KOS2 until 2008-08-28, at : which time it became the official receiver for : this site. Data for this parallel period is : available from the LDC at : http://gnss1.lr.tudelft.nl 3.11 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 356091 Firmware Version : 6.00/3.017 Elevation Cutoff Setting : 0 deg Date Installed : 2009-04-17T15:04Z Date Removed : 2009-05-19T09:15Z Temperature Stabiliz. : none Additional Information : Firmware update 3.12 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 356091 Firmware Version : 7.50/3.017 Elevation Cutoff Setting : 0 deg Date Installed : 2009-05-19T09:15Z Date Removed : 2010-03-20T14:30Z Temperature Stabiliz. : none Additional Information : Firmware update 3.13 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 356091 Firmware Version : 7.80/3.018 Elevation Cutoff Setting : 0 deg Date Installed : 2010-03-20T14:30Z Date Removed : 2010-04-30T21:10Z Temperature Stabiliz. : none Additional Information : Firmware update 3.14 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 356091 Firmware Version : 7.80/3.019 Elevation Cutoff Setting : 0 deg Date Installed : 2010-04-30T21:10Z Date Removed : 2011-05-20T16:15Z Temperature Stabiliz. : none Additional Information : Firmware update 3.15 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 356091 Firmware Version : 8.20/3.019 Elevation Cutoff Setting : 0 deg Date Installed : 2011-05-20T16:15Z Date Removed : 2011-11-28T14:02Z Temperature Stabiliz. : none Additional Information : Receiver removed for off-site testing 3.16 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 356091 Firmware Version : 8.20/3.019 Elevation Cutoff Setting : 0 deg Date Installed : 2012-04-23T14:00Z Date Removed : 2015-11-27T11:00Z Temperature Stabiliz. : none Additional Information : Receiver reinstalled 3.x Receiver Type : (A20, from rcvr_ant.tab; see instructions) Satellite System : (GPS+GLO+GAL+BDS+QZSS+IRNSS+SBAS) Serial Number : (A20, but note the first A5 is used in SINEX) Firmware Version : (A11) Elevation Cutoff Setting : (deg) Date Installed : (CCYY-MM-DDThh:mmZ) Date Removed : (CCYY-MM-DDThh:mmZ) Temperature Stabiliz. : (none or tolerance in degrees C) Additional Information : (multiple lines) 4. GNSS Antenna Information 4.1 Antenna Type : AOAD/M_B DUTD Serial Number : 119 Antenna Reference Point : BCR Marker->ARP Up Ecc. (m) : 0.1050 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : DUTD Radome Serial Number : 119 Antenna Cable Type : (vendor & type number) Antenna Cable Length : 30 m Date Installed : 1991-01-01 Date Removed : 2011-07-20T00:00Z Additional Information : Model C146-6-1 : DUT design (polyester cone) : Power and Signal cable separated, power : submitted by original GPS-receiver ROGUE SNR-8, : and later batteries 4.2 Antenna Type : AOAD/M_B UNKN Serial Number : 119 Antenna Reference Point : BCR Marker->ARP Up Ecc. (m) : 0.1050 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : UNKN Radome Serial Number : Antenna Cable Type : (vendor & type number) Antenna Cable Length : 30 m Date Installed : 2011-07-20T00:00Z Date Removed : 2011-09-13T00:00Z Additional Information : 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). 4.3 Antenna Type : AOAD/M_B NONE Serial Number : 119 Antenna Reference Point : BCR Marker->ARP Up Ecc. (m) : 0.1050 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : (vendor & type number) Antenna Cable Length : 30 m Date Installed : 2011-09-13T00:00Z Date Removed : 2016-03-08T12:00Z Additional Information : Model C146-6-1 : Power and Signal cable separated, power : submitted by batteries : The antenna itself remains unaltered since 1991. : The antenna was removed from March 2016. 4.x Antenna Type : (A20, from rcvr_ant.tab; see instructions) Serial Number : (A*, but note the first A5 is used in SINEX) Antenna Reference Point : (BPA/BCR/XXX from "antenna.gra"; see instr.) Marker->ARP Up Ecc. (m) : (F8.4) Marker->ARP North Ecc(m) : (F8.4) Marker->ARP East Ecc(m) : (F8.4) Alignment from True N : (deg; + is clockwise/east) Antenna Radome Type : (A4 from rcvr_ant.tab; see instructions) Radome Serial Number : Antenna Cable Type : (vendor & type number) Antenna Cable Length : (m) Date Installed : (CCYY-MM-DDThh:mmZ) Date Removed : (CCYY-MM-DDThh:mmZ) Additional Information : (multiple lines) 5. Surveyed Local Ties 5.1 Tied Marker Name : KOSG-23(SLR) Tied Marker Usage : SLR/LOCAL CONTROL/FOOTPRINT Tied Marker CDP Number : 8833 Tied Marker DOMES Number : 13504M002 Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : 12.458 m dy (m) : 37.501 m dz (m) : -23.025 m Accuracy (mm) : 3 mm Survey method : GPS CAMPAIGN/TRILATERATION/TRIANGULATION Date Measured : 1993-04-14 Additional Information : KOSG-23 Mobile SLR Reference Point 5.2 Tied Marker Name : KOSG-28 Tied Marker Usage : LOCAL CONTROL/FOOTPRINT/GPS Tied Marker CDP Number : 8833 Tied Marker DOMES Number : 13504M002 Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : -17.115 m dy (m) : 32.379 m dz (m) : 1.144 m Accuracy (mm) : 3 mm Survey method : GPS CAMPAIGN/TRILATERATION/TRIANGULATION Date Measured : 1993-04-14 Additional Information : KOSG-28 Mobile GPS Reference Point, also : EUREF reference marker 5.3 Tied Marker Name : KOS1 Tied Marker Usage : GNSS Tied Marker CDP Number : (A4) Tied Marker DOMES Number : 13504M005 Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : 388.530 m dy (m) : 630.930 m dz (m) : -339.580 m Accuracy (mm) : 5 mm Survey method : GPS Date Measured : 2013-06-23T00:00Z Additional Information : Provisional result from GPS data, local survey : with triangulation, trilateration and levelling : has been conducted. Results are pending. 5.x Tied Marker Name : Tied Marker Usage : (SLR/VLBI/LOCAL CONTROL/FOOTPRINT/etc) Tied Marker CDP Number : (A4) Tied Marker DOMES Number : (A9) Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : (m) dy (m) : (m) dz (m) : (m) Accuracy (mm) : (mm) Survey method : (GPS CAMPAIGN/TRILATERATION/TRIANGULATION/etc) Date Measured : (CCYY-MM-DDThh:mmZ) Additional Information : (multiple lines) 6. Frequency Standard 6.1 Standard Type : EXTERNAL RUBIDIUM Input Frequency : 5 MHz Effective Dates : 1991-01-01/1996-01-26 Notes : 5065A Rubidium Vapor Frequency Standard 6.2 Standard Type : EXTERNAL QUARTZ Input Frequency : 5 MHz Effective Dates : 1996-01-27/1996-02-14 Notes : Frequency Crystal Oscillator 6.3 Standard Type : EXTERNAL RUBIDIUM Input Frequency : 5 MHz Effective Dates : 1996-02-14/2000-11-23 Notes : 5065A Rubidium Vapor Frequency Standard 6.4 Standard Type : INTERNAL Input Frequency : (if external) Effective Dates : 2000-11-24/2000-11-27 Notes : (multiple lines) 6.5 Standard Type : EXTERNAL QUARTZ Input Frequency : 5 MHz Effective Dates : 2000-11-27/2008-08-27 Notes : OSCILLOQUARTZ Oven Controlled Crystal Oscillator : OCXO 8600 6.6 Standard Type : INTERNAL Input Frequency : (if external) Effective Dates : 2008-08-28/CCYY-MM-DD Notes : (multiple lines) 6.x Standard Type : (INTERNAL or EXTERNAL H-MASER/CESIUM/etc) Input Frequency : (if external) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 7. Collocation Information 7.1 Instrumentation Type : SLR Status : MOBILE Effective Dates : 1984-01-01/1996-12-31 Notes : Regular occupations by MTLRS-2 7.2 Instrumentation Type : ABSOLUTE GRAVIMETERS Status : MOBILE Effective Dates : 1973-01-01/CCYY-MM-DD Notes : (multiple lines) 7.3 Instrumentation Type : RELATIVE GRAVIMETERS Status : MOBILE Effective Dates : 1973-01-01/CCYY-MM-DD Notes : (multiple lines) 7.4 Instrumentation Type : SEISMOMETER Status : PERMANENT Effective Dates : 1973-01-01/1995-12-31 Notes : (multiple lines) 7.x Instrumentation Type : (GPS/GLONASS/DORIS/PRARE/SLR/VLBI/TIME/etc) Status : (PERMANENT/MOBILE) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8. Meteorological Instrumentation 8.1.x Humidity Sensor Model : Manufacturer : Serial Number : Data Sampling Interval : (sec) Accuracy (% rel h) : (% rel h) Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.2.x Pressure Sensor Model : Manufacturer : Serial Number : Data Sampling Interval : (sec) Accuracy : (hPa) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.3.x Temp. Sensor Model : Manufacturer : Serial Number : Data Sampling Interval : (sec) Accuracy : (deg C) Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.4.x Water Vapor Radiometer : Manufacturer : Serial Number : Distance to Antenna : (m) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Notes : (multiple lines) 8.5.x Other Instrumentation : (multiple lines) 9. Local Ongoing Conditions Possibly Affecting Computed Position 9.1.x Radio Interferences : (TV/CELL PHONE ANTENNA/RADAR/etc) Observed Degradations : (SN RATIO/DATA GAPS/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 9.2.x Multipath Sources : (METAL ROOF/DOME/VLBI ANTENNA/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 9.3.x Signal Obstructions : (TREES/BUILDINGS/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 10. Local Episodic Effects Possibly Affecting Data Quality 10.1 Date : 2003-03-17/2003-03-17 Event : 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 10.2 Date : 2008-07-17/2008-07-17 Event : MINOR CONSTRUCTION (FOUNDATION FOR SOLAR PANELS) 10.3 Date : 2010-04-01/2011-11-28 Event : 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. 10.4 Date : 2011-07-20/2011-11-28 Event : 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. 10.5 Date : 2011-11-28/2012-04-23 Event : Observations were stopped because of : powerproblems and bad data quality, observations : were resumed on 2012-04-23 late afternoon. 10.x Date : (CCYY-MM-DD/CCYY-MM-DD) Event : (TREE CLEARING/CONSTRUCTION/etc) 11. On-Site, Point of Contact Agency Information Agency : Delft University of Technology : Department of Geoscience and Remote Sensing : (GRS) Preferred Abbreviation : DUT Mailing Address : Stevinweg 1 : 2628 CN Delft : Netherlands (the) Primary Contact Contact Name : TU Delft GNSS team Telephone (primary) : +31 15 2784907 Telephone (secondary) : Fax : E-mail : gnss-citg@tudelft.nl Secondary Contact Contact Name : GI-RD Telephone (primary) : +31 6 52481939 Telephone (secondary) : Fax : E-mail : rd@kadaster.nl Additional Information : (multiple lines) 12. Responsible Agency (if different from 11.) Agency : (multiple lines) Preferred Abbreviation : (A10) Mailing Address : (multiple lines) Primary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : (multiple lines) 13. More Information Primary Data Center : BKG Secondary Data Center : IGN URL for More Information : http://gnss1.tudelft.nl/dpga/ Hardcopy on File Site Map : ./dpga/station/Kootwijk.html Site Diagram : X Horizon Mask : X Monument Description : X Site Pictures : ./dpga/station/Kootwijk.html Additional Information : (multiple lines) Antenna Graphics with Dimensions ROGUE: DORNE MARGOLIN B (Allen Osborne Design) S/N 119 according to general figures. ----- / + \ <-- 0.096 L2 | + | <-- 0.078 L1 +-----------------+-------------+------------------+ <-- 0.070 TCR | | | | | | | | | | +-----------------+------x------+------------------+ <-- 0.000 ARP | | +-------------+ <-- -0.011 || || <-- 0.351 --> ROGUE: DORNE MARGOLIN B (Allen Osborne Design) S/N 119 calibrated by DUT/KOSG in cooperation with ESA/ESTEC. ----- / + \ <-- 0.101 L2 | + | <-- 0.077 L1 +--------------------------------------------------+ <-- 0.070 TCR | | | | | | | | | | +------------------------x-------------------------+ <-- 0.000 ARP | | +-------------+ <-- -0.010 || || <-- 0.351 --> ARP: Antenna Reference Point