STEE00GBR 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 : 2024-02-16 Report Type : UPDATE If Update: Previous Site Log : stee00gbr_20230908.log Modified/Added Sections : 3.16, 3.17 1. Site Identification of the GNSS Monument Site Name : Stevenage Four Character ID : STEE Monument Inscription : IERS DOMES Number : 19144M001 CDP Number : (A4) Monument Description : Steel Pole Height of the Monument : 1.0 m Monument Foundation : Brick built Control Tower Foundation Depth : (m) Marker Description : Centre of mount thread on plane of antenna ARP Date Installed : 2005-02-23 Geologic Characteristic : (BEDROCK/CLAY/CONGLOMERATE/GRAVEL/SAND/etc) Bedrock Type : (IGNEOUS/METAMORPHIC/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 : Antenna is approx. 5m above ground level. : Monument height provided wrt top bracket. 2. Site Location Information City or Town : Stevenage State or Province : Hertfordshire Country : United Kingdom of Great Britain and Northern : Ireland (the) Tectonic Plate : EURASIAN Approximate Position (ITRF) X coordinate (m) : 3943669.000 Y coordinate (m) : -12286.000 Z coordinate (m) : 4996173.000 Latitude (N is +) : +515405.41 Longitude (E is +) : -0001042.59 Elevation (m,ellips.) : 157.9 Additional Information : (multiple lines) 3. GNSS Receiver Information 3.1 Receiver Type : LEICA GRX1200GGPRO Satellite System : GPS+GLO Serial Number : 356452 Firmware Version : 6.00 Elevation Cutoff Setting : 5 deg Date Installed : 2008-12-04T12:00Z Date Removed : 2009-07-01T13:15Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.2 Receiver Type : LEICA GRX1200+GNSS Satellite System : GPS+GLO Serial Number : 356256 Firmware Version : 7.50 Elevation Cutoff Setting : 5 deg Date Installed : 2009-07-01T13:35Z Date Removed : 2010-05-17T00:12Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.3 Receiver Type : LEICA GRX1200+GNSS Satellite System : GPS+GLO Serial Number : 356256 Firmware Version : 7.81 Elevation Cutoff Setting : 5 deg Date Installed : 2010-05-17T00:15Z Date Removed : 2011-06-08T09:05Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.4 Receiver Type : LEICA GRX1200+GNSS Satellite System : GPS+GLO Serial Number : 356400 Firmware Version : 7.81 Elevation Cutoff Setting : 0 deg Date Installed : 2011-06-08T09:40Z Date Removed : 2012-08-16T08:19Z Temperature Stabiliz. : none Additional Information : ME firmware v4.005 3.5 Receiver Type : LEICA GRX1200+GNSS Satellite System : GPS+GLO Serial Number : 356400 Firmware Version : 8.20 Elevation Cutoff Setting : 0 deg Date Installed : 2012-08-16T08:40Z Date Removed : 2015-06-10T12:04Z Temperature Stabiliz. : none Additional Information : ME firmware v4.007 3.6 Receiver Type : LEICA GRX1200+GNSS Satellite System : GPS+GLO Serial Number : 356400 Firmware Version : 9.20 Elevation Cutoff Setting : 0 deg Date Installed : 2015-06-10T12:28Z Date Removed : 2018-07-11T09:20Z Temperature Stabiliz. : none Additional Information : ME firmware v6.112 3.7 Receiver Type : TRIMBLE ALLOY Satellite System : GPS+GLO+GAL+BDS Serial Number : 5804R40035 Firmware Version : 5.33 Elevation Cutoff Setting : 0 deg Date Installed : 2018-07-11T10:05Z Date Removed : 2018-10-24T09:10Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.8 Receiver Type : TRIMBLE ALLOY Satellite System : GPS+GLO+GAL+BDS Serial Number : 5804R40035 Firmware Version : 5.37 Elevation Cutoff Setting : 0 deg Date Installed : 2018-10-24T09:15Z Date Removed : 2019-10-03T08:15Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.9 Receiver Type : TRIMBLE ALLOY Satellite System : GPS+GLO+GAL+BDS Serial Number : 5804R40035 Firmware Version : 5.42 Elevation Cutoff Setting : 0 deg Date Installed : 2019-10-03T08:25Z Date Removed : 2020-02-28T14:40Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.10 Receiver Type : TRIMBLE ALLOY Satellite System : GPS+GLO+GAL+BDS Serial Number : 5804R40035 Firmware Version : 5.44 Elevation Cutoff Setting : 0 deg Date Installed : 2020-02-28T14:50Z Date Removed : 2020-05-15T10:00Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.11 Receiver Type : TRIMBLE ALLOY Satellite System : GPS+GLO+GAL+BDS Serial Number : 5804R40035 Firmware Version : 5.45 Elevation Cutoff Setting : 0 deg Date Installed : 2020-05-15T10:10Z Date Removed : 2020-10-07T14:40Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.12 Receiver Type : TRIMBLE ALLOY Satellite System : GPS+GLO+GAL+BDS Serial Number : 5804R40035 Firmware Version : 6.08 Elevation Cutoff Setting : 0 deg Date Installed : 2020-10-07T14:50Z Date Removed : 2021-11-09T11:20Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.13 Receiver Type : TRIMBLE ALLOY Satellite System : GPS+GLO+GAL+BDS Serial Number : 5804R40035 Firmware Version : 6.12 Elevation Cutoff Setting : 0 deg Date Installed : 2021-11-09T11:35Z Date Removed : 2022-06-17T09:15Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.14 Receiver Type : TRIMBLE ALLOY Satellite System : GPS+GLO+GAL+BDS Serial Number : 5804R40035 Firmware Version : 6.14 Elevation Cutoff Setting : 0 deg Date Installed : 2022-06-17T09:25Z Date Removed : 2023-04-17T11:20Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.15 Receiver Type : TRIMBLE ALLOY Satellite System : GPS+GLO+GAL+BDS Serial Number : 5804R40035 Firmware Version : 6.20 Elevation Cutoff Setting : 0 deg Date Installed : 2023-04-17T11:35Z Date Removed : 2023-09-08T10:05Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.16 Receiver Type : TRIMBLE ALLOY Satellite System : GPS+GLO+GAL+BDS Serial Number : 5804R40035 Firmware Version : 6.21 Elevation Cutoff Setting : 0 deg Date Installed : 2023-09-08T10:15Z Date Removed : 2024-02-16T11:30Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.17 Receiver Type : TRIMBLE ALLOY Satellite System : GPS+GLO+GAL+BDS Serial Number : 5804R40035 Firmware Version : 6.23 Elevation Cutoff Setting : 0 deg Date Installed : 2024-02-16T11:40Z Date Removed : CCYY-MM-DDThh:mmZ Temperature Stabiliz. : none Additional Information : (multiple lines) 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 : LEIAR25 LEIT Serial Number : 08440026 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 : +160 deg Antenna Radome Type : LEIT Radome Serial Number : Antenna Cable Type : RG58 Antenna Cable Length : 10 m Date Installed : 2008-12-04T12:00Z Date Removed : 2018-09-05T08:40Z Additional Information : (multiple lines) 4.2 Antenna Type : LEIAR10 NONE Serial Number : 21204031 Antenna Reference Point : BAM Marker->ARP Up Ecc. (m) : 0.0500 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : +160 deg Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : RG58 Antenna Cable Length : 10 m Date Installed : 2018-09-05T10:05Z Date Removed : CCYY-MM-DDThh:mmZ Additional Information : (multiple lines) 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 : 2008-12-04/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 : OS 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 LEIAR25 +-------+ <-- 0.1995 / + \ | + | |---+-------------+----| <-- 0.1614 TCR |------------------------------| |--------------------------------------| |----------------------------------------------| +--------------------------------------------------+ | | | | | | | | +-+--------------------------------------------------+-+ +-------------------+-------------+--------------------+ <-- 0.0320 BCR | | | | +------x------+ <-- 0.0000 BPA=ARP <-- 0.3802 --> ARP: Antenna Reference Point L1 : L1 Phase Center L2 : L2 Phase Center TCR: Top of Chokering BCR: Bottom of Chokering BPA: Bottom of Preamplifier LEIAR10 . ^ . <-- 0.1362 . . . . . . . . / \ | | | | <-- 0.0362 Notch +-----____ ____-----+ -----____ ____-\ \- +--x--+ \_\ <-- 0.0000 BAM=ARP NOM=NRP <-- 0.2400 --> BAM: Bottom of Antenna Mount