Site Information for Cabauw

2023-12-18T11:33Z

Cabauw

The Cabauw Experimental Site for Atmospheric Remote Sensing (CESAR), at Cabauw (near Lopik), the Netherlands, is operated under responsability of KNMI. The site hosts a large number of meteorological and atmospheric remote sensing sensors operated by KNMI, RIVM, TU Delft, ESA, and others, such as (water vapour) radiometers, Sun photometer, 213 meter mast with meteorological sensors, wind profiler, radar, and a Raman Lidar.

On-site contact: Marcel Brinkenberg, KNMI
GNSS contact: Hans van der Marel, TUD/CITG/GRS

GNSS Instrument(s)

NameMarkerReceiverAntennaOperatorNetworkStart dateEnd date
cabw13536M001XTRIMBLE 5700ASH700936C_MTUD/CITG/GRSEGVAP,CESAR2001-08-062019-05-16
cab113536M002ASHTECH Z-XII3ASH700936C_MTUD/CITG/GRSCESAR2005-07-202008-05-29
cab213536M003SEPT POLARX4ASH700936C_MTUD/CITG/GRSCESAR2005-11-222020-02-27
cbw113536M001LEICA GR50LEIAR20NSGIAGRS.NL,EGVAP,GRUAN,CESAR2019-05-16

Markers

IDNamedXdYdZInstrumentsInstalledRemoved
13536M001Cabauw IGRS (GNSS ARP)0.00000.00000.0000cbw12019-05-16T10:00Z
13536M001XCabauw GPS (old)0.25200.01300.3840cabw2001-08-06T11:50Z2019-05-16T10:00Z
13536M002Cabauw Tower66.89003.9620215.2610cab12005-07-20T09:00Z2008-05-29T10:00Z
13536M003Cabauw RS96.9760222.6230-90.0830cab22005-11-22T09:00Z

Pictures

CAB1_with_Ashtech_Z-XII3(1).jpg
CAB1_with_Ashtech_Z-XII3(1)
CAB1_with_Ashtech_Z-XII3(2).jpg
CAB1_with_Ashtech_Z-XII3(2)
CABW_Cabinet_with_Trimble5700.jpg
CABW_Cabinet_with_Trimble5700
CABW_Data_logging_PC.jpg
CABW_Data_logging_PC
CABW_mast_with_Zephyr_antenna(1).jpg
CABW_mast_with_Zephyr_antenna(1)
CABW_mast_with_Zephyr_antenna(2).jpg
CABW_mast_with_Zephyr_antenna(2)
CABW_mast_with_Zephyr_antenna(3).jpg
CABW_mast_with_Zephyr_antenna(3)
CBW1_GNSS_Antenna.jpg
CBW1_GNSS_Antenna
CBW1_Instrument_Cabinet.jpg
CBW1_Instrument_Cabinet
CBW1_from_the_North.jpg
CBW1_from_the_North
CBW1_from_the_SouthEast.jpg
CBW1_from_the_SouthEast
CBW1_from_the_West.jpg
CBW1_from_the_West
Cabauw tower with CABW antenna mast.jpg
Cabauw tower with CABW antenna mast
Cabauw tower.jpg
Cabauw tower
Cabauw_map.png
Cabauw_map
Control_room_CABW_data_logging_PC.jpg
Control_room_CABW_data_logging_PC
Vertigo.jpg
Vertigo
View from 213 meters (1).jpg
View from 213 meters (1)
View from 213 meters (2).jpg
View from 213 meters (2)
Wind profiler.jpg
Wind profiler

Notes

2019-05-16T10:00Z 2053/4 136 -
The CABW monument was upgraded to geodetic quality by installing a so-called Integrated Geodetic Reference Station, with ascending and descending InSAR corner reflectors, on the concrete block that was previously used for the CABW mast. The new monument and data stream have been given a new name to mark this upgrade. The new name is CBW1. The CBW abbreviation is also in line with the station identification used for meteorological sensors at the site. The new monument is about 4 cm to the South, 1 cm to the East and 46 cm lower.
2001-01-15T00:00Z 1097/1 015 - 2019-05-16T10:00Z 2053/4 136
The stability of the GPS CABW monument is good enough for atmospheric science, but is not suitable for reference frame purposes or geophysical research as the long term stability due to the soil, method of foundation and construction cannot be guarantied.
2001-01-15T00:00Z 1097/1 015 - 2008-01-15T00:00Z 1462/2 015
The official DOMES number 13536M___ was assigned by IERS on 2008-01-11. All RINEX files until 2008-01-15 use the provisional DOMES number 13599M___ .
2001-01-15T00:00Z 1097/1 015 -
The excentricities are only rough estimates. Final values need to be determined.

Active instruments

CBW1 (Cabauw IGRS)

Marker ID: 13536M001
Operator: Kadaster
Log file: cbw100nld_20230417.log

Receiver

Installedweek/d doyRemovedweek/d doyReceiver typeS/NFirmware
2019-05-16T15:00Z2053/4 1362022-03-30T20:50Z2203/3 089LEICA GR5018706494.31/7.403
2022-03-30T20:50Z2203/3 089 LEICA GR5018706494.52/7.711

Antenna

Installedweek/d doyRemovedweek/d doyAntenna typeDomeS/NHeightAntenna calibration
2019-05-16T15:00Z2053/4 1362020-05-27T08:40Z2107/3 148LEIAR20LEIM203310020.0250
2020-05-27T08:50Z2107/3 148 LEIAR20LEIM203310020.0000

External Frequency

Installedweek/d doyRemovedweek/d doyExt. Frequency type
2019-05-16T15:00Z2053/4 136 INTERNAL

Notes

2019-05-16T15:00Z 2053/4 136 - 2020-05-27T08:40Z 2107/3 148
There was a temporary spacer between the pole and Kadaster mount putting the antenna effectively 2.5 cm above the designated marker. However, this was originally not reflected in the RINEX header for data between May 2019 and May 27, 2020. On May 27, 2020, the antenna heights in the RINEX files have been corrected (0.0000 -> 0.0250). After May 27, 2020, 8:45 UTC, the antenna height is zero.
2020-05-27T08:40Z 2107/3 148 - 2020-05-27T08:50Z 2107/3 148
On May 27, 2020, the temporary spacer between the pole and Kadaster mount was replaced. The new spacer is 2.5 cm thick, instead of the 5 cm of the spacer use previously. The Kadaster mount is now 2.5 cm lower than before and the antenna is now flush with the marker.

Discontinued instruments

CABW (Cabauw)

Marker ID: 13536M001X
Operator: TU DELFT

Receiver

Installedweek/d doyRemovedweek/d doyReceiver typeS/NFirmware
2001-08-06T11:50Z1126/1 2182002-02-19T13:00Z1154/2 050JPS LEGACY001432.2
2002-02-21T16:00Z1154/4 0522015-06-25T00:00Z1850/4 176TRIMBLE 570070394N1.04/S0.00
2017-04-27T00:00Z1946/4 1172019-05-16T09:00Z2053/4 136TRIMBLE 570070394N1.04/S0.00

Antenna

Installedweek/d doyRemovedweek/d doyAntenna typeDomeS/NHeightAntenna calibration
2001-08-06T11:50Z1126/1 2182002-02-19T13:00Z1154/2 050JPSREGANT_DD_ENONE000982.1000JPSREGANT_DD_E1_NONE_ra0098.atx
2002-02-21T16:00Z1154/4 0522012-03-02T15:00Z1677/5 062TRM41249.00NONE820780.0533
2012-03-17T12:00Z1679/6 0772019-05-16T09:00Z2053/4 136ASH700936C_MSNOW119940.0000

External Frequency

Installedweek/d doyRemovedweek/d doyExt. Frequency type
2001-08-06T00:00Z1126/1 2182019-05-16T09:00Z2053/4 136INTERNAL

Notes

2001-08-06T11:50Z 1126/1 218 -
In the RINEX files the marker name 13599M001 is used instead of the DOMES number 13536M001 for historic reasons.
2011-01-25T14:00Z 1620/2 025 -
A faulty antenna cable was replaced. There is a gap in the data from 2011-01-21T16:21Z until 2011-01-25T15:00Z.
2012-02-26T08:00Z 1677/0 057 - 2012-03-17T12:00Z 1679/6 077
The mount of the Trimble Zephyr antenna was broken on 26 February 2012 just after 08:00 UTC due to corrosion. The antenna, which was found hanging on the antenna cable, was removed on the 2nd of March 2012. On the 17th of March 2012 a replacement mount and Ashtech Chokering antenna was installed. The original Trimble Zephyr appears not to be working and has been replaced by another antenna type. The new antenna was not installed in the same location: there is a offset and height change after the remount.

CAB1 (Cabauw Tower)

Marker ID: 13536M002
Operator: TU DELFT

Receiver

Installedweek/d doyRemovedweek/d doyReceiver typeS/NFirmware
2005-07-20T09:00Z1332/3 2012006-01-16T11:00Z1358/1 016ASHTECH Z-XII3008291L00/1D04
2006-01-16T11:00Z1358/1 0162006-07-18T07:00Z1384/2 199ASHTECH Z-XII3008231L00/1D04
2006-07-18T07:00Z1384/2 1992007-05-21T09:30Z1428/1 141ASHTECH Z-XII3008291L00/1D04
2007-05-21T12:30Z1428/1 1412008-04-11T10:00Z1474/5 102ASHTECH Z-XII300829CD00/1D02
2008-04-11T10:00Z1474/5 1022008-05-29T10:00Z1481/4 150ASHTECH Z-XII300823CD00/1D02

Antenna

Installedweek/d doyRemovedweek/d doyAntenna typeDomeS/NHeightAntenna calibration
2005-07-20T09:00Z1332/3 2012008-05-29T10:00Z1481/4 150ASH700936C_MSNOW121090.0ASH700936C_M____SNOW_12109.atx

External Frequency

Installedweek/d doyRemovedweek/d doyExt. Frequency type
2005-07-20T09:00Z1332/3 2012008-05-29T10:00Z1481/4 150INTERNAL

Notes

2005-07-20T09:00Z 1332/3 201 - 2008-05-29T10:00Z 1481/4 150
In the RINEX files the marker name 13599M002 is used instead of the DOMES number 13536M002 for historic reasons.
2005-07-20T09:00Z 1332/3 201 - 2007-05-22T00:00Z 1428/2 142
In the RINEX files for this period wrong serial numbers for the receiver and antenna were used.
2008-05-29T10:00Z 1481/4 150 -
The receiver was stopped due to interference problems with the radar mounted on top of the mast.

CAB2 (Cabauw RS)

Marker ID: 13536M003
Operator: TU DELFT

Receiver

Installedweek/d doyRemovedweek/d doyReceiver typeS/NFirmware
2005-11-22T09:00Z1350/2 3262007-05-21T08:30Z1428/1 141ASHTECH Z-XII3008371L00/1D04
2007-05-21T09:00Z1428/1 1412016-06-23T00:00Z1902/4 175ASHTECH Z-XII300837CD00/1D02
2017-04-26T11:30Z1946/3 1162018-11-15T14:30Z2027/4 319SEPT POLARX431021922.9.6
2018-11-15T14:30Z2027/4 3192020-02-27T07:15Z2094/4 058SEPT POLARX431021922.9.6-patch2

Antenna

Installedweek/d doyRemovedweek/d doyAntenna typeDomeS/NHeightAntenna calibration
2005-11-22T09:00Z1350/2 3262020-02-27T07:15Z2094/4 058ASH700936C_MSNOW121120.0

External Frequency

Installedweek/d doyRemovedweek/d doyExt. Frequency type
2005-11-22T09:00Z1350/2 3262020-02-27T07:15Z2094/4 058INTERNAL

Notes

2019-05-17T08:30Z 2053/5 137 -
On Friday 17 May, 2019, at about 8:30 UTC, one of the guy wires of the CAB2 stations was damaged by a lawnmower. This resulted in a shift of about 41 mm to the South and 14 mm to the East.
2005-11-22T09:00Z 1350/2 326 -
In the RINEX files the marker name 13599M003 is used instead of the DOMES number 13536M003 for historic reasons.
2005-11-22T09:00Z 1350/2 326 - 2006-01-19T23:59Z 1358/4 019
In the RINEX files for this period wrong serial numbers for the receiver and antenna were used.
For more information contact Hans van der Marel.