ACRG00GHA Site Information Form (site log)
     International GNSS Service
     See Instructions at:
       ftp://igs.org/pub/station/general/sitelog_instr.txt

0.   Form

     Prepared by (full name)  : markus.bradke@gfz-potsdam.de
     Date Prepared            : 2020-03-25
     Report Type              : UPDATE
     If Update:
      Previous Site Log       : acrg_20200318.log
      Modified/Added Sections : 0, 3.2, 3.3, 11


1.   Site Identification of the GNSS Monument

     Site Name                : Accra
     Four Character ID        : ACRG
     Monument Inscription     : 
     IERS DOMES Number        : 32904M001
     CDP Number               : 
     Monument Description     : BRASS ROD
       Height of the Monument : 
       Monument Foundation    : ROOF
       Foundation Depth       : 
     Marker Description       : 
     Date Installed           : 2018-10-03T12:00Z
     Geologic Characteristic  : 
       Bedrock Type           : 
       Bedrock Condition      : 
       Fracture Spacing       : 
       Fault zones nearby     : 
         Distance/activity    : 
     Additional Information   : 


2.   Site Location Information

     City or Town             : Accra
     State or Province        : Greater Accra Region
     Country                  : Ghana
     Tectonic Plate           : AFRICAN
     Approximate Position (ITRF)
       X coordinate (m)       : 6347491.3770
       Y coordinate (m)       : -22944.8191
       Z coordinate (m)       : 622823.1488
       Latitude (N is +)      : +053829.32
       Longitude (E is +)     : -0001225.60
       Elevation (m,ellips.)  : 83.5
     Additional Information   : 


3.   GNSS Receiver Information

3.1  Receiver Type            : JAVAD TR_G3TH
     Satellite System         : GPS+GLO+GAL
     Serial Number            : 33932
     Firmware Version         : 3.7.4b0-193-7438
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2018-10-03T12:00Z
     Date Removed             : 2018-12-18T12:00Z
     Temperature Stabiliz.    : none
     Additional Information   : tinyPC/3 S/N: 020

3.2  Receiver Type            : JAVAD TR_G3TH
     Satellite System         : GPS+GLO+GAL
     Serial Number            : 33932
     Firmware Version         : 3.7.5
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2018-12-18T12:00Z
     Date Removed             : 2020-03-25T14:33Z
     Temperature Stabiliz.    : none
     Additional Information   : tinyPC/3 S/N: 017
                              : Board revision TR_G3TH_6

3.3  Receiver Type            : JAVAD TR_G3TH
     Satellite System         : GPS+GLO+GAL
     Serial Number            : 33932
     Firmware Version         : 3.7.9
     Elevation Cutoff Setting : 0 deg
     Date Installed           : 2020-03-25T14:34Z
     Date Removed             : CCYY-MM-DDThh:mmZ
     Temperature Stabiliz.    : none
     Additional Information   : tinyPC/3 S/N: 017
                              : Board revision TR_G3TH_6

3.x  Receiver Type            : (A20, from rcvr_ant.tab; see instructions)
     Satellite System         : (GPS+GLO+GAL+BDS+QZSS+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             : JAV_RINGANT_G3T NONE
     Serial Number            : 325
     Antenna Reference Point  : BAM
     Marker->ARP Up Ecc. (m)  : 0.1300
     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       : EcoFlex 10
     Antenna Cable Length     : 30.00 m
     Date Installed           : 2017-10-03T12:00Z
     Date Removed             : CCYY-MM-DDThh:mmZ
     Additional Information   : 

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        : 
       Effective Dates        : 2017-10-03/CCYY-MM-DD
       Notes                  : 

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

8.1.1  Humidity Sensor Model  : WXT520
       Manufacturer           : VAISALA
       Serial Number          : G4130237
       Data Sampling Interval : 300 sec
       Accuracy (% rel h)     : 5
       Aspiration             : NATURAL
       Height Diff to Ant     : 0.00 m
       Calibration date       : 2011-12-03
       Effective Dates        : 2018-10-03/CCYY-MM-DD
       Notes                  : 

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)

8.2.1  Pressure Sensor Model  : WXT520
       Manufacturer           : VAISALA
       Serial Number          : G4130237
       Data Sampling Interval : 300 sec
       Accuracy               : 0.5 hPa
       Height Diff to Ant     : 0.00 m
       Calibration date       : 2011-12-03
       Effective Dates        : 2018-10-03/CCYY-MM-DD
       Notes                  : 

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)

8.3.1  Temp. Sensor Model     : WXT520
       Manufacturer           : VAISALA
       Serial Number          : G4130237
       Data Sampling Interval : 300 sec
       Accuracy               : 0.3 deg C
       Aspiration             : NATURAL
       Height Diff to Ant     : 0.00 m
       Calibration date       : 2011-12-03
       Effective Dates        : 2018-10-03/CCYY-MM-DD
       Notes                  : 

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                   : Ghana Geological Survey Authority
     Preferred Abbreviation   : GGSA
     Mailing Address          : Post Office Box M80
                              : Accra, Ghana
     Primary Contact
       Contact Name           : Nicholas Opoku
       Telephone (primary)    : (+233)243361195
       Telephone (secondary)  : 
       Fax                    : 
       E-mail                 : nichopoku@yahoo.com
     Secondary Contact
       Contact Name           : 
       Telephone (primary)    : 
       Telephone (secondary)  : 
       Fax                    : 
       E-mail                 : 
     Additional Information   : 


12.  Responsible Agency (if different from 11.)

     Agency                   : Helmholtz-Zentrum Potsdam
                              : Deutsches GeoForschungsZentrum GFZ
     Preferred Abbreviation   : GFZ
     Mailing Address          : Telegrafenberg A17
                              : 14473 Potsdam / Germany
     Primary Contact
       Contact Name           : Dr. Markus Ramatschi
       Telephone (primary)    : (+49)331-288-1746
       Telephone (secondary)  : 
       Fax                    : (+49)331-288-1759
       E-mail                 : gnss@gfz-potsdam.de
     Secondary Contact
       Contact Name           : Markus Bradke
       Telephone (primary)    : (+49)331-288-1182
       Telephone (secondary)  : 
       Fax                    : (+49)331-288-1759
       E-mail                 : bradke@gfz-potsdam.de
     Additional Information   : 

13.  More Information

     Primary Data Center      : CDDIS
     Secondary Data Center    : BKG
     URL for More Information : 
     Hardcopy on File
       Site Map               : 
       Site Diagram           : 
       Horizon Mask           : 
       Monument Description   : 
       Site Pictures          : 
     Additional Information   : 
     Antenna Graphics with Dimensions

JAV_RINGANT_G3T

                       ---------                          <--  0.0614
                     /           \
                   /               \
  +-------------------------------------------------+     <--  0.0410  TCR
  |                                                 |
  |              +-------------------+              |
  |              |   \           /   |              |
  |              |    \         /    |              |
  |              |      +--x--+      |              |     <--  0.0000  BAM=ARP
  +--------------+-------------------+--------------+     <-- -0.0260  BCR
                                                                       RXC=NRP
  <--                    0.3260                   -->