RDON 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) : Susan Jeffries Date Prepared : 2023-10-03 Report Type : UPDATE If Update: Previous Site Log : rdon_20180712.log Modified/Added Sections : (n.n,n.n,...) 1. Site Identification of the GNSS Monument Site Name : Redonda Four Character ID : RDON Monument Inscription : IERS DOMES Number : (A9) CDP Number : (A4) Monument Description : SHALLOW-DRILLED BRACED Height of the Monument : (m) Monument Foundation : (STEEL RODS, CONCRETE BLOCK, ROOF, etc) Foundation Depth : (m) Marker Description : SCIGN MOUNT MARK Date Installed : 2012-05-24 Geologic Characteristic : (BEDROCK/CLAY/CONGLOMERATE/GRAVEL/SAND/etc) Bedrock Type : (IGNEOUS/METAMORPHIC/SEDIMENTARY) Bedrock Condition : (FRESH/JOINTED/WEATHERED) Fracture Spacing : (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 : Welded SDB monument fixed into massive ancient : lava flow deposits at the southern end of the : island. 2. Site Location Information City or Town : Redonda State or Province : Redonda Country : Antigua and Barbuda Tectonic Plate : Caribbean Approximate Position (ITRF) X coordinate (m) : 2832760.773 Y coordinate (m) : -5406214.5792 Z coordinate (m) : 1845897.7188 Latitude (N is +) : +165603.06 Longitude (E is +) : -0622046.53 Elevation (m,ellips.) : 106.6 Additional Information : 3. GNSS Receiver Information 3.1 Receiver Type : TRIMBLE NETR8 Satellite System : GPS Serial Number : 5010K65991 Firmware Version : 4.48 Elevation Cutoff Setting : 0 deg Date Installed : 2012-05-24T18:00Z Date Removed : 2016-04-21T14:30Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.2 Receiver Type : TRIMBLE NETR9 Satellite System : GPS Serial Number : 5145K79571 Firmware Version : 5.03 Elevation Cutoff Setting : deg Date Installed : 2016-04-21T14:30Z Date Removed : 2016-09-23T15:01Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.3 Receiver Type : TRIMBLE NETR9 Satellite System : GPS Serial Number : 5145K79571 Firmware Version : 5.14 Elevation Cutoff Setting : deg Date Installed : 2016-09-23T15:01Z Date Removed : 2018-04-23T18:01Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.4 Receiver Type : TRIMBLE NETR9 Satellite System : GPS Serial Number : 5145K79571 Firmware Version : 5.22 Elevation Cutoff Setting : deg Date Installed : 2018-04-23T18:01Z Date Removed : 2022-06-21T19:01Z Temperature Stabiliz. : none Additional Information : (multiple lines) 3.5 Receiver Type : TRIMBLE NETR9 Satellite System : GPS Serial Number : 5145K79571 Firmware Version : 5.45 Elevation Cutoff Setting : deg Date Installed : 2022-06-21T19:01Z 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+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 : TRM55971.00 TZGD Serial Number : 1441004504 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0083 Marker->ARP North Ecc(m) : 0 Marker->ARP East Ecc(m) : 0 Alignment from True N : deg Antenna Radome Type : TZGD Radome Serial Number : N/A Antenna Cable Type : (vendor & type number) Antenna Cable Length : (m) Date Installed : 2012-05-24T18:00Z Date Removed : 2016-04-27T18:00Z Additional Information : (multiple lines) 4.2 Antenna Type : TRM59800.00 SCIT Serial Number : 5238354554 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0083 Marker->ARP North Ecc(m) : 0 Marker->ARP East Ecc(m) : 0 Alignment from True N : (deg; + is clockwise/east) Antenna Radome Type : SCIT Radome Serial Number : N/A Antenna Cable Type : (vendor & type number) Antenna Cable Length : (m) Date Installed : 2016-04-27T18:00Z 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 : Effective Dates : 2012-05-24/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 7.1 Instrumentation Type : NONE Status : (PERMANENT/MOBILE) Effective Dates : (CCYY-MM-DDThh:mmZ) Notes : (multiple lines) 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 : H1230010 Data Sampling Interval : 300 Accuracy (% rel h) : Aspiration : Height Diff to Ant : 1 Calibration date : (CCYY-MM-DD) Effective Dates : 2012-05-24/2016-04-27 Notes : (multiple lines) 8.2.1 Pressure Sensor Model : WXT520 Manufacturer : Vaisala Serial Number : H1230010 Data Sampling Interval : 300 Accuracy : Height Diff to Ant : 1 Calibration date : (CCYY-MM-DD) Effective Dates : 2012-05-24/2016-04-27 Notes : (multiple lines) 8.3.1 Temp. Sensor Model : WXT520 Manufacturer : Vaisala Serial Number : H1230010 Data Sampling Interval : 300 Accuracy : Aspiration : Height Diff to Ant : 1 Calibration date : (CCYY-MM-DD) Effective Dates : 2012-05-24/2016-04-27 Notes : (multiple lines) 8.4.1 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) 8.1.2 Humidity Sensor Model : WXT520 Manufacturer : Vaisala Serial Number : L4740219 Data Sampling Interval : Accuracy (% rel h) : Aspiration : Height Diff to Ant : Calibration date : (CCYY-MM-DD) Effective Dates : 2016-04-27/CCYY-MM-DD Notes : (multiple lines) 8.2.2 Pressure Sensor Model : WXT520 Manufacturer : Vaisala Serial Number : L4740219 Data Sampling Interval : Accuracy : Height Diff to Ant : Calibration date : (CCYY-MM-DD) Effective Dates : 2016-04-27/CCYY-MM-DD Notes : (multiple lines) 8.3.2 Temp. Sensor Model : WXT520 Manufacturer : Vaisala Serial Number : L4740219 Data Sampling Interval : Accuracy : Aspiration : Height Diff to Ant : Calibration date : (CCYY-MM-DD) Effective Dates : 2016-04-27/CCYY-MM-DD Notes : (multiple lines) 8.4.2 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 : UNAVCO Preferred Abbreviation : UNAVCO Mailing Address : : : : Primary Contact Contact Name : James Normandeau Telephone (primary) : 303-358-6110 Telephone (secondary) : Fax : E-mail : jim.normandeau@earthscope.org Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : (multiple lines) 12. Responsible Agency (if different from 11.) Agency : Preferred Abbreviation : Mailing Address : 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 : UNAVCO Boulder Facility Archive Secondary Data Center : URL for More Information : https://www.unavco.org 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 TRM29659.00 TRM59800.00 TRM59800.80 TRM59900.00 ----- / \ | | +-------------------------------------------------+ <-- 0.1020 TCR | | | | | | | | +-+-------------------------------------------------+-+ <-- 0.0381 +-------------------+-------------+-------------------+ <-- 0.0350 BCR | | =| | +------x------+ <-- 0.0000 BPA=ARP <-- 0.3810 -->