LERW00GBR 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) : Geodesy & Positioning (geodeticenquiries@os.uk) Date Prepared : 2023-04-06 Report Type : UPDATE If Update: Previous Site Log : lerw00gbr_20220905.log Modified/Added Sections : 11 1. Site Identification of the GNSS Monument Site Name : Lerwick Four Character ID : LERW Monument Inscription : IERS DOMES Number : 19159M002 CDP Number : (A4) Monument Description : STEEL PLATE AND CARBON FIBRE PIPE Height of the Monument : (m) Monument Foundation : CONCRETE BLOCK Foundation Depth : (m) Marker Description : TOP OF 40mm DIA THREAD ON STEEL PLATE Date Installed : 1998-04-16T12:00Z Geologic Characteristic : BEDROCK Bedrock Type : SEDIMENTARY (SANDSTONE) Bedrock Condition : (FRESH/JOINTED/WEATHERED) Fracture Spacing : (0 cm/1-10 cm/11-50 cm/51-200 cm/over 200 cm) Fault zones nearby : (YES/NO/Name of the zone) Distance/activity : (multiple lines) Additional Information : The monument is mounted on a 1mx1m : concrete block, which is 1m deep and : founded on the Sandstone bedrock. 2. Site Location Information City or Town : Lerwick State or Province : Shetland Isles Country : United Kingdom of Great Britain and Northern : Ireland (the) Tectonic Plate : EURASIAN Approximate Position (ITRF) X coordinate (m) : 3183054.600 Y coordinate (m) : -65838.500 Z coordinate (m) : 5508325.700 Latitude (N is +) : +600820.90 Longitude (E is +) : -0011105.79 Elevation (m,ellips.) : 131.3 Additional Information : (multiple lines) 3. GNSS Receiver Information 3.1 Receiver Type : ASHTECH Z-XII3 Satellite System : GPS Serial Number : 02272 Firmware Version : 1F50 Elevation Cutoff Setting : 5 deg Date Installed : 1998-04-18T00:00Z Date Removed : 1999-08-15T23:59Z Temperature Stabiliz. : none Additional Information : Full receiver serial number is LP 02272. : Operation using a direct modem connection. : Download using CGREMOTE v5.4.00 CGRS1F50 and : CGHOSE v5.4.00 CGRS1F50. : Conversion to RINEX using ASRINEXO v2.9.7 : (with PR SMOOTH FLAG 0). 3.2 Receiver Type : ASHTECH Z-XII3 Satellite System : GPS Serial Number : 02272 Firmware Version : CD00 Elevation Cutoff Setting : 5 deg Date Installed : 1999-08-17T00:00Z Date Removed : 2006-07-19T23:59Z Temperature Stabiliz. : none Additional Information : Full receiver serial number is LP 02272. : Operation using a direct modem connection. : Download using CGREMOTE v5.4.00 CGRSCD00 and : CGHOSE v6.0.00 CGRSCD00. : Conversion to RINEX using ASRINEXO v2.9.7 : (with PR SMOOTH FLAG 0). 3.3 Receiver Type : LEICA SR530 Satellite System : GPS Serial Number : 0034330 Firmware Version : 4.20 Elevation Cutoff Setting : (deg) Date Installed : 2006-07-22T00:00Z Date Removed : 2010-01-14T00:00Z Temperature Stabiliz. : none Additional Information : Full receiver serial number is . : Operation as part of OSNet. : Download as part of OSNet. : Conversion to RINEX as part of OSNet. : **** Station decommissioned 2010-01-14 **** 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 : ASH700936D_M SNOW Serial Number : 14248 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 1.8003 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : SNOW Radome Serial Number : Antenna Cable Type : ASHTECH 100914 REVA Antenna Cable Length : 30 m Date Installed : 1998-04-18T00:00Z Date Removed : 2010-01-14T00:00Z Additional Information : Full antenna serial number is CR 14248. : **** Station decommissioned 2010-01-14 **** 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 : 1998-04-18/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 ASH700936D_M ----- / + \ | + | +--------------------------------------------------+ <-- 0.102 TCR | | | | | | | | +-+--------------------------------------------------+-+ <-- 0.038 +-------------------+-------------+--------------------+ <-- 0.035 BCR | | =| | +------x------+ <-- 0.000 BPA=ARP <-- 0.381 -->