NAS100GBR Site Information Form (site log v2.0)
International GNSS Service
See Instructions at:
https://files.igs.org/pub/station/general/sitelog_instr_v2.0.txt
0. Form
Prepared by (full name) : Geodesy & Positioning (geodeticenquiries@os.uk)
Date Prepared : 2023-04-06
Report Type : UPDATE
If Update:
Previous Site Log : nas100gbr_20220906.log
Modified/Added Sections : 11
1. Site Identification of the GNSS Monument
Site Name : Nash Point
Nine Character ID : NAS100GBR
Monument Inscription :
IERS DOMES Number : (A9)
CDP Number : (A4)
Monument Description : Unknown
Height of the Monument : (m)
Monument Foundation : Unknown
Foundation Depth : (m)
Marker Description : Centre of mount thread on plane of antenna ARP
Date Installed : 2000-05-21
Geologic Characteristic : Unknown
Bedrock Type : UNKNOWN
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 : Station no longer submitting data
2. Site Location Information
City or Town : Llantwit Major
State or Province : Vale of Glamorgan
Country or Region : GBR
Tectonic Plate : EURASIAN
Approximate Position (ITRF)
X coordinate (m) : 3979694.000
Y coordinate (m) : -246984.000
Z coordinate (m) : 4961571.000
Latitude (N is +) : +512402.84
Longitude (E is +) : -0033304.61
Elevation (m,ellips.) : 111.7
Additional Information : (multiple lines)
3. GNSS Receiver Information
3.1 Receiver Type : TRIMBLE 4000SSI
Satellite System : GPS
Serial Number : (A20, but note the first A5 is used in SINEX)
Firmware Version : Nav 7.29 Sig 3.07
Elevation Cutoff Setting : (deg)
Date Installed : 2000-05-21T00:00Z
Date Removed : 2001-03-17T23:59Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : (multiple lines)
3.2 Receiver Type : TRIMBLE 4000SSI
Satellite System : GPS
Serial Number : 00022010
Firmware Version : Nav 7.29 Sig 3.07
Elevation Cutoff Setting : (deg)
Date Installed : 2001-03-18T00:00Z
Date Removed : 2003-04-26T23:59Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : (multiple lines)
3.3 Receiver Type : TRIMBLE 4000SSI
Satellite System : GPS
Serial Number : (A20, but note the first A5 is used in SINEX)
Firmware Version : Nav 7.29 Sig 3.07
Elevation Cutoff Setting : (deg)
Date Installed : 2003-04-27T00:00Z
Date Removed : 2003-05-05T23:59Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : (multiple lines)
3.4 Receiver Type : TRIMBLE 4000SSI
Satellite System : GPS
Serial Number : (A20, but note the first A5 is used in SINEX)
Firmware Version : Nav 7.29 S
Elevation Cutoff Setting : (deg)
Date Installed : 2003-05-06T00:00Z
Date Removed : 2003-07-01T23:59Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : (multiple lines)
3.5 Receiver Type : TRIMBLE 4000SSI
Satellite System : GPS
Serial Number : (A20, but note the first A5 is used in SINEX)
Firmware Version : 7.29
Elevation Cutoff Setting : (deg)
Date Installed : 2003-07-02T00:00Z
Date Removed : 2004-10-08T23:59Z
Temperature Stabiliz. : (deg C) +/- (deg C)
Additional Information : (multiple lines)
3.6 Receiver Type : TRIMBLE 4000SSI
Satellite System : GPS
Serial Number : 22010
Firmware Version : 7.29
Elevation Cutoff Setting : (deg)
Date Installed : 2004-10-09T00:00Z
Date Removed : 2005-06-27T00:00Z
Temperature Stabiliz. : none
Additional Information : Station no longer submitting data
: **** Station decommissioned 2005-06-27 ****
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 : TRM33429.00+GP DOME
Serial Number : UNKNOWN
Antenna Reference Point : BPA
Marker->ARP Up Ecc. (m) : 0.0000
Marker->ARP North Ecc(m) : 0.0000
Marker->ARP East Ecc(m) : 0.0000
Alignment from True N : (deg; + is clockwise/east)
Antenna Radome Type : DOME
Radome Serial Number :
Antenna Cable Type : (vendor & type number)
Antenna Cable Length : (m)
Date Installed : 2000-05-21T00:00Z
Date Removed : 2005-06-27T00:00Z
Additional Information :
: **** Station decommissioned 2005-06-27 ****
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.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 : INTERNAL
Input Frequency : (if external)
Effective Dates : 2000-05-21/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.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.x Date : (CCYY-MM-DD/CCYY-MM-DD)
Event : (TREE CLEARING/CONSTRUCTION/etc)
11. On-Site, Point of Contact Agency Information
Agency : Ordnance Survey
: Geodesy & Positioning
Preferred Abbreviation : OS
Mailing Address : Adanac Drive
: SO16 0AS Southampton
: United Kingdom of Great Britain and Northern
: Ireland (the)
Primary Contact
Contact Name : Geodesy & Positioning
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail : geodeticenquiries@os.uk
Secondary Contact
Contact Name :
Telephone (primary) :
Telephone (secondary) :
Fax :
E-mail :
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 : EPOS
Secondary Data Center :
URL for More Information :
Hardcopy on File
Site Map : (Y or URL)
Site Diagram : (Y or URL)
Horizon Mask : (Y or URL)
Monument Description : (Y or URL)
Site Pictures : (Y or URL)
Additional Information : (multiple lines)
Antenna Graphics with Dimensions
TRM33429.00+GP
----+----
/ + \
++----------------+-----------------+-----------------++ <-- 0.0591 TGP
++---------------+-------------------+----------------++ <-- 0.0556 BGP
| |
| |
| |
+------x------+ <-- 0.000 ARP=BPA
<-- 0.4668 --> INNER EDGE
<-- 0.4826 --> OUTER EDGE