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
