dpga > stations > Kootwijk

Site Information for Kootwijk

2017-01-20T06:34Z

Kootwijk

Kootwijk Observatory for Satellite Geodesy (KOSG), Kootwijk, The Netherlands.

On-site contact: AGRS.NL team, Kadaster, +31652481939
GNSS contact: Hans van der Marel, TUD/LR/DEOS

GNSS Instrument(s)

NameMarkerReceiverAntennaOperatorNetworkStart dateEnd date
kosa13504M003TRIMBLE 4700AOAD/M_BAGRS.NLAGRS1996-04-232001-01-30
kosg13504M003LEICA GRX1200GGPROAOAD/M_BTUD/CITG/GRSIGS,EPN1994-06-132015-11-27
kos113504M005SEPT POLARX4LEIAR25.R3AGRS.NLIGS,EPN2013-06-18
kos213504M003LEICA GRX1200GGPROAOAD/M_BTUD/CITG/GRSNONE2008-07-312008-08-28

Markers

IDNamedXdYdZInstrumentsInstalledRemoved
13504M003GPS mark 339334-250.00000.00000.0000kosa,kosg,kos2
13504M005GPS mark 339352-02388.5300630.9300-339.5800kos1

Pictures

KOS1_View_East_sm.jpg
KOS1_View_North_sm.jpg
KOS1_View_South_sm.jpg
KOS1_View_West_sm.jpg
KOS1_antenneopstelling.jpg
KOS1_gebouw_A.jpg
KOS1_hoogte_offset_ARP.JPG
KOS1_local_survey.JPG
KOS1_patchkast_met_Septentrio_ontvanger.jpg
KOSG_Antenna_26oct2008_1.jpg
KOSG_Antenna_26oct2008_2.jpg
KOSG_Antenna_mast_detail_2004.jpg
KOSG_Antenna_mast_with_Solar_Panels_1.jpg
KOSG_Antenna_mast_with_Solar_Panels_2.jpg
KOSG_Antenna_mast_with_observatory_2004.jpg
KOSG_Instrument_cabinet.jpg
KOSG_KOS1_local_survey.JPG
KOSG_Kootwijk_Observatory_entrance_2004.jpg
KOSG_Kootwijk_Observatory_with_GPS_mast_2004.jpg
KOSG_Site_2009a.jpg
KOSG_Site_2009b.jpg
KOSG_Solar_Panel_installation.jpg
KOSG_Solar_Panels_with_Instrument_cabinet.jpg
KOSG_Summer_2008.jpg
KOSG_Winter_2008.jpg
KOSG_local_survey.JPG

Notes

2013-05-23T00:00Z 1741/4 143 -
Marker 13504M005 is co-located (within 10 meter) with a facility for measuring absolute gravity and an underground (primary) marker of the national levelling network (NAP). Absolute gravity is measured yearly using a Micro-g FG-5 (#234).
2013-06-26T09:00Z 1746/3 177 - 2013-06-27T16:00 1746/4 178
A local survey and levelling have been conducted to obtain the eccentricities for the new marker 13504M005.

KOSA (Kootwijk)

Marker ID: 13504M003
Operator: AGRS.NL (KAD,MD,TUD)

Receiver

Installedweek/d doyRemovedweek/d doyReceiver typeS/NFirmware
1996-04-23T14:16Z0850/2 1141998-05-11T00:00Z0957/1 131ROGUE SNR-12 RM2243.2.32.1
1998-05-11T00:00Z0957/1 1311998-08-18T00:00Z0971/2 230ROGUE SNR-12 RM2293.2.32.1
1998-08-18T00:00Z0971/2 2301999-07-14T07:05Z1018/3 195ROGUE SNR-12 RM2223.2.32.1
1999-07-14T07:05Z1018/3 1952000-04-27T08:00Z1059/4 118ROGUE SNR-12 RM2223.2.32.9
2000-04-27T08:00Z1059/4 1182001-01-30T07:00Z1099/2 030TRIMBLE 4700965201.20

Antenna

Installedweek/d doyRemovedweek/d doyAntenna typeDomeS/NHeightAntenna calibration
1991-01-01T00:00Z0573/2 001 AOAD/M_BDUTD1190.105

External Frequency

Installedweek/d doyRemovedweek/d doyExt. Frequency type
1996-02-14T00:00Z0840/3 0452000-04-27T08:00Z1059/4 118RUBIDIUM
2000-04-27T08:00Z1059/4 1182001-01-30T10:00Z1099/2 030INTERNAL

Notes

1998-05-11T00:00Z 0957/1 131 - 1998-08-18T00:00Z 0971/2 230
Shared receiver with KOSG, data is not independent. Rawdata files for KOSA (CBI format) were created from KOSG rawdata files (conan binary format), and then converted into RINEX.
1999-03-01T00:00Z 0999/1 060 - 2000-04-27T08:00Z 1059/4 118
Shared receiver with KOSG, data is not independent. KOSA rawdata files (CBI format) were used to generate also RINEX files for KOSG.
2000-04-27T08:00Z 1059/4 118 - 2000-06-05T18:34Z 1065/1 157
A bug in the data logging software resulted in double difference ambiguities that are not integer. Hence, ambibuity fixed solutions are not correct during this period, although the ambiguity float solutions are okay. 1059/4/08:00 (27/4) - 1065/1/18:34 (5/6).

KOSG (Kootwijk Observatory for Satellite Geodesy)

Marker ID: 13504M003
Operator: TUD/CITG/GRS
Log file: kosg_20160307.log

Receiver

Installedweek/d doyRemovedweek/d doyReceiver typeS/NFirmware
1994-06-13T00:00Z0753/1 1641994-08-23T00:00Z0763/2 235ROGUE SNR-8R117Meenix 7.8
1994-08-24T00:00Z0763/3 2361994-11-22T00:00Z0776/2 326ROGUE SNR-8000T1752.8
1994-11-23T00:00Z0776/3 3271996-01-25T00:00Z0837/4 025ROGUE SNR-8R117Meenix 7.8
1996-01-26T00:00Z0837/5 0261996-04-23T00:00Z0850/2 114ROGUE SNR-12 RMT2093.2.32.1
1996-04-24T00:00Z0850/3 1151999-02-28T00:00Z0999/0 059ROGUE SNR-12 RMT2293.2.32.1
1999-03-01T00:00Z0999/1 0601999-07-14T07:00Z1018/3 195ROGUE SNR-12 RMT2223.2.32.1
1999-07-14T07:10Z1018/3 1952000-04-27T00:00Z1059/4 118ROGUE SNR-12 RMT2223.2.32.9
2000-04-27T08:00Z1059/4 1182000-11-23T00:00Z1089/4 328ROGUE SNR-12 RMT2223.2.32.9
2000-11-24T17:34Z1089/5 3292000-11-26T00:00Z1090/0 331AOA SNR-12 ACT2243.3.32.4
2000-11-27T15:16Z1090/1 3322008-08-28T08:00Z1494/4 241AOA SNR-12 ACT2293.3.32.4
2008-08-28T13:00Z1494/4 2412009-04-17T14:45Z1527/5 107LEICA GRX1200GGPRO3560916.00/3.014
2009-04-17T15:04Z1527/5 1072009-05-19T09:15Z1532/2 139LEICA GRX1200GGPRO3560916.00/3.017
2009-05-19T09:15Z1532/2 1392010-03-20T14:30Z1575/6 079LEICA GRX1200GGPRO3560917.50/3.017
2010-03-20T14:30Z1575/6 0792010-04-30T21:10Z1581/5 120LEICA GRX1200GGPRO3560917.80/3.018
2010-04-30T21:10Z1581/5 1202011-05-20T16:15Z1636/5 140LEICA GRX1200GGPRO3560917.80/3.019
2011-05-20T16:15Z1636/5 1402011-11-28T14:02Z1664/1 332LEICA GRX1200GGPRO3560918.20/3.019
2012-04-23T14:00Z1685/1 1142013-09-27T13:30Z1759/5 270LEICA GRX1200GGPRO3560918.20/3.019
2013-09-27T13:30Z1759/5 2702014-03-09T11:15Z1783/0 068LEICA GR2518304113.00/6.113
2014-03-09T11:15Z1783/0 0682014-07-10T08:30Z1800/4 191LEICA GRX1200GGPRO3560918.20/3.019
2014-07-10T08:30Z1800/4 1912015-11-27T11:00Z1872/5 331LEICA GRX1200GGPRO3560918.20/3.054

Antenna

Installedweek/d doyRemovedweek/d doyAntenna typeDomeS/NHeightAntenna calibration
1991-01-01T00:00Z0573/2 0012011-07-20T00:00Z1645/3 201AOAD/M_BDUTD1190.105
2011-07-20T00:00Z1645/3 2012011-09-13T00:00Z1653/2 256AOAD/M_BUNKN1190.105
2011-09-13T00:00Z1653/2 2562016-03-08T12:00Z1887/2 068AOAD/M_BNONE1190.105

External Frequency

Installedweek/d doyRemovedweek/d doyExt. Frequency type
1991-01-01T00:00Z0573/2 0011996-01-26T00:00Z0837/5 026RUBIDIUM
1996-01-27T00:00Z0837/6 0271996-02-14T00:00Z0840/3 045QUARTZ
1996-02-14T00:00Z0840/3 0452000-11-23T00:00Z1089/4 328RUBIDIUM
2000-11-24T00:00Z1089/5 3292000-11-27T00:00Z1090/1 332INTERNAL
2000-11-27T00:00Z1090/1 3322008-08-28T08:00Z1494/4 241QUARTZ
2008-08-28T13:00Z1494/4 2412015-11-27T11:00Z1872/5 331INTERNAL

Notes

1994-12-15T00:00Z 0779/4 349 - 1996-04-22T23:59Z 0850/1 113
Raw data files (conan binary) have also been converted into CBI format (compressed binary).
1998-05-11T00:00Z 0957/1 131 - 1998-08-18T00:00Z 0971/2 230
Shared receiver with KOSA, data is not independent.
1999-03-01T00:00Z 0999/1 060 - 2000-04-27T08:00Z 1059/4 118
Shared receiver with KOSA, data is not independent. The RINEX files for KOSG were created from the rawdata files (CBI format) of KOSA. On 2000-04-27 the receiver a new receiver was installed for KOSA and so the already installed receiver continued to provide solely data for KOSG, albeit in a different raw data format (turbo binary).
2000-04-27T08:00Z 1059/4 118 -
Data logging software and raw data format was changed.
2003-03-17T08:00Z 1210/1 076 -
On March 17, 2003, about 8:00 UTC (2003.209), a guy 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 -0.0021 in E (EPN timeseries by Ambrus Keyneres), respectively -0.0083 in N and -0.0033 in E (JPL timeseries by Hans van der Marel). Local measurements indicate a shift of 5 mm to the South.
2008-03-01T00:00Z 1468/6 061 - 2008-04-08T23:50Z 1474/2 099
No data available for doy 63-99 (data logging PC was stolen w/ data).
2008-04-28T00:00Z 1477/1 119 - 2008-05-04T23:50Z 1478/0 125
No data availablefor doy 119-125 due to s/w failure. Other days with missing data in 2008: 017, 023, 130, 142, 149 and 154.
2009-07-09T03:00Z 1539/4 190 - 2009-07-11T10:58Z 1539/6 192
Thursday morning, July 9, 2009, KOSG stopped providing GNSS measurements. On site inspection revealed that the solar panels providing power to the station have been stolen. New solar panels were installed on Saturday July 11, 2009, and power was restored to the receiver. No data is available for Thursday 2009-07-09 03:00:10 until Saturday 2009-07-11 10:58:40.
2010-04-01T00:00Z 1577/4 091 - 2011-11-28T14:02Z 1664/1 332
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.
2011-07-20T00:00Z 1645/3 201 - 2011-09-13T00:00Z 1653/2 256
On 18 Sept 2011, during a visual inspection it was noted 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, because after 13 Sep 2011 the height time series is rather flat again but with an offset of about 7 mm in height. 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).
2011-07-20T00:00Z 1645/3 201 - 2011-11-28T14:00Z 1664/1 332
The data quality has been degrading over time. We advise to use data for this period only with the utmost caution.
2011-11-14T23:00Z 1662/1 318 - 2011-11-17T12:16Z 1662/4 321
Power interuption. On 17 Nov 2011 the fuel cell was installed to provide to backup the solar panels during winter conditions.
2011-11-28T14:00Z 1664/1 332 - 2012-04-23T14:00Z 1685/1 114
The fuel cell failed on 28 Nov 2011. Repair turned out to be impossible; because of this, and the bad data quality of the station, it was decided to halt the receiver until the problems were resolved. Observations started again on 23 April 2012 after testing the receiver in Delft. No problems were detected with the receiver; also the frequent loss-of-locks has disappeared. The receiver was reinstalled in Kootwijk in order to resume testing on site. Publication of the data resumed on 21 June 2012.
2011-09-13T00:00Z 1653/2 256 -
As the position of KOSG is not stable 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.
2013-06-27T15:00Z 1746/4 178 -
We stopped submitting data to IGS and EPN data centers for KOSG, though the data is still available through the local data center.

KOS1 (Kootwijk Observatory for Satellite Geodesy)

Marker ID: 13504M005
Operator: Kadaster
Log file: kos1_20170120.log

Receiver

Installedweek/d doyRemovedweek/d doyReceiver typeS/NFirmware
2013-06-18T12:44Z1745/2 1692013-09-09T02:00Z1757/1 252SEPT POLARX430021292.3.4
2013-09-10T09:58Z1757/2 2532015-02-18T16:00Z1832/3 049SEPT POLARX430021292.5.2
2015-02-18T16:00Z1832/3 0492015-06-18T08:43Z1849/4 169SEPT POLARX430021292.7-beta1
2015-06-18T08:43Z1849/4 1692017-01-18T15:04Z1932/3 018SEPT POLARX430021292.9.0
2017-01-18T15:04Z1932/3 0182017-01-18T19:45Z1932/3 018SEPT POLARX430021292.9.5
2017-01-18T19:04Z1932/3 018 SEPT POLARX430021292.9.6

Antenna

Installedweek/d doyRemovedweek/d doyAntenna typeDomeS/NHeightAntenna calibration
2013-05-23T00:00Z1741/4 143 LEIAR25.R3LEIT100500090.130LEIAR25.R3______LEIT_10050009.atx

External Frequency

Installedweek/d doyRemovedweek/d doyExt. Frequency type
2013-06-18T12:44Z1745/2 169 INTERNAL

Notes

2013-05-23T00:00Z 1741/4 143 -
The marker is the downward pointing point of a RVS pin with RD number 339352-02, located 0.13 m under the ARP of the Multi-GNSS Chokering Antenna. The marker is located approximately 564.00 m South and 588.35 m East of, and 7.95 m above, the marker with DOMES number 13504M003 (RD 339334-25) in use by the now decommissioned KOSG.

KOS2 (Kootwijk Observatory for Satellite Geodesy)

Marker ID: 13504M003
Operator: TUD/CITG/GRS

Receiver

Installedweek/d doyRemovedweek/d doyReceiver typeS/NFirmware
2008-07-31T08:00Z1490/4 2132008-08-28T10:00Z1494/4 241LEICA GRX1200GGPRO3560916.00/3.14

Antenna

Installedweek/d doyRemovedweek/d doyAntenna typeDomeS/NHeightAntenna calibration
1991-01-01T00:00Z0573/2 001 AOAD/M_BDUTD1190.105

External Frequency

Installedweek/d doyRemovedweek/d doyExt. Frequency type
2008-07-31T08:00Z1490/4 213 INTERNAL

Notes

2008-08-28T13:00Z 1494/4 241 -
Receiver will replaced KOSG Rogue.
For more information contact Hans van der Marel.