LERI00GBR 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            : 2024-02-05
     Report Type              : UPDATE
     If Update:
      Previous Site Log       : leri00gbr_20230901.log
      Modified/Added Sections : 3.9, 3.10


1.   Site Identification of the GNSS Monument

     Site Name                : Lerwick
     Nine Character ID        : LERI00GBR
     Monument Inscription     : 
     IERS DOMES Number        : 19159M003
     CDP Number               : (A4)
     Monument Description     : Stainless steel pin
       Height of the Monument : 0.1 m
       Monument Foundation    : Bedrock
       Foundation Depth       : 0.4 m
     Marker Description       : Centre of mount thread/top of height marker bolt
     Date Installed           : 2009-06-16
     Geologic Characteristic  : BEDROCK
       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     : Unknown
         Distance/activity    : (multiple lines)
     Additional Information   : (multiple lines)


2.   Site Location Information

     City or Town             : Lerwick
     State or Province        : Shetland Isles
     Country or Region        : GBR
     Tectonic Plate           : EURASIAN
     Approximate Position (ITRF)
       X coordinate (m)       : 3183134.000
       Y coordinate (m)       : -65772.000
       Z coordinate (m)       : 5508281.000
       Latitude (N is +)      : +600818.00
       Longitude (E is +)     : -0011101.37
       Elevation (m,ellips.)  : 131.4
     Additional Information   : (multiple lines)


3.   GNSS Receiver Information

3.1  Receiver Type            : LEICA GRX1200+GNSS
     Satellite System         : GPS+GLO
     Serial Number            : 356514
     Firmware Version         : 7.50
     Elevation Cutoff Setting : 5 deg
     Date Installed           : 2009-06-16T15:00Z
     Date Removed             : 2009-09-11T09:35Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : ME firmware v4.003.S6

3.2  Receiver Type            : LEICA GRX1200+GNSS
     Satellite System         : GPS+GLO
     Serial Number            : 356514
     Firmware Version         : 7.53
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2009-09-11T10:26Z
     Date Removed             : 2011-04-20T08:09Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : ME firmware v4.003.S6

3.3  Receiver Type            : LEICA GRX1200+GNSS
     Satellite System         : GPS+GLO
     Serial Number            : 356189
     Firmware Version         : 7.81
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2011-04-20T08:31Z
     Date Removed             : 2015-06-03T14:51Z
     Temperature Stabiliz.    : (deg C) +/- (deg C)
     Additional Information   : ME firmware v4.005

3.4  Receiver Type            : LEICA GRX1200+GNSS
     Satellite System         : GPS+GLO
     Serial Number            : 356189
     Firmware Version         : 9.20
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2015-06-03T15:23Z
     Date Removed             : 2020-03-19T12:50Z
     Temperature Stabiliz.    : none
     Additional Information   : ME firmware v6.112

3.5  Receiver Type            : LEICA GRX1200+GNSS
     Satellite System         : GPS+GLO
     Serial Number            : 356189
     Firmware Version         : 9.20
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2020-03-19T13:10Z
     Date Removed             : 2022-03-03T13:00Z
     Temperature Stabiliz.    : none
     Additional Information   : ME firmware v6.407

3.6  Receiver Type            : TRIMBLE ALLOY
     Satellite System         : GPS+GLO+GAL+BDS
     Serial Number            : 5804R40022
     Firmware Version         : 6.12
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2022-03-03T13:10Z
     Date Removed             : 2022-06-16T10:45Z
     Temperature Stabiliz.    : none
     Additional Information   : (multiple lines)

3.7  Receiver Type            : TRIMBLE ALLOY
     Satellite System         : GPS+GLO+GAL+BDS
     Serial Number            : 5804R40022
     Firmware Version         : 6.14
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2022-06-16T10:50Z
     Date Removed             : 2023-04-13T15:30Z
     Temperature Stabiliz.    : none
     Additional Information   : (multiple lines)

3.8  Receiver Type            : TRIMBLE ALLOY
     Satellite System         : GPS+GLO+GAL+BDS
     Serial Number            : 5804R40022
     Firmware Version         : 6.20
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2023-04-13T15:45Z
     Date Removed             : 2023-09-01T13:45Z
     Temperature Stabiliz.    : none
     Additional Information   : (multiple lines)

3.9  Receiver Type            : TRIMBLE ALLOY
     Satellite System         : GPS+GLO+GAL+BDS
     Serial Number            : 5804R40022
     Firmware Version         : 6.21
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2023-09-01T13:55Z
     Date Removed             : 2024-02-05T14:10Z
     Temperature Stabiliz.    : none
     Additional Information   : (multiple lines)

3.10 Receiver Type            : TRIMBLE ALLOY
     Satellite System         : GPS+GLO+GAL+BDS
     Serial Number            : 5804R40022
     Firmware Version         : 6.23
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2024-02-05T14:20Z
     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            : 08420018
     Antenna Reference Point  : BPA
     Marker->ARP Up Ecc. (m)  :   0.1040
     Marker->ARP North Ecc(m) :   0.0000
     Marker->ARP East Ecc(m)  :   0.0000
     Alignment from True N    : 0 deg
     Antenna Radome Type      : LEIT
     Radome Serial Number     : 
     Antenna Cable Type       : Huber+Suhner 1/2' Sucofeed
     Antenna Cable Length     : 100 m
     Date Installed           : 2009-06-16T15:00Z
     Date Removed             : CCYY-MM-DDThh:mmZ
     Additional Information   : Antenna has been individually calibrated

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        : 2009-06-16/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      : BKG
     Secondary Data Center    : BEV
     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