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 -->