MDO100USA Site Information Form (site log) International GNSS Service See Instructions at: https://files.igs.org/pub/station/general/sitelog_instr_v2.0.txt 0. Form Prepared by (full name) : Jacob Sklar Date Prepared : 2024-10-01 Report Type : UPDATE If Update: Previous Site Log : mdo100usa_20240930.log Modified/Added Sections : 4.8 1. Site Identification of the GNSS Monument Site Name : McDonald Observatory Site Nine Character ID : MDO100USA Monument Inscription : 4011-S McDonald Observatory GPS Station IERS DOMES Number : 40442M012 CDP Number : none Monument Description : CONCRETE PILLAR Height of the Monument : 0.5 m Monument Foundation : Foundation Depth : Marker Description : STAINLESS STEEL PLATE Date Installed : 1993-06-03T00:00Z Geologic Characteristic : Bedrock Type : Bedrock Condition : Fracture Spacing : Fault zones nearby : Distance/activity : Additional Information : 0.457m diameter stainless steel plate : set flush in center of a 0.762m : diameter concrete monolith that : projects 0.5m above ground. Antenna : is mounted and centered in a stainless : ecured to the concrete 2. Site Location Information City or Town : Fort Davis State or Province : Texas Country or Region : USA Tectonic Plate : NORTH AMERICAN Approximate Position (ITRF) X coordinate (m) : -1329998.7970 Y coordinate (m) : -5328393.3570 Z coordinate (m) : 3236504.1410 Latitude (N is +) : +304049.84 Longitude (E is +) : -1040053.98 Elevation (m,ellips.) : 2004.5 Additional Information : Site located at the University of Texas : at Austin's McDonald Observatory near : Fort Davis, Texas. : Rocky Mountain Geological Province. : Tertiary igneous rocks found on the : surface. Due to erosion, the the soils : of hills and mountains are shallow, : whereas the soils of valleys and plains : are deep. 3. GNSS Receiver Information 3.1 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : unknown Firmware Version : 2.6 1/8/1993 Elevation Cutoff Setting : 4 deg Date Installed : 1993-06-03T00:00Z Date Removed : 1993-06-30T00:00Z Temperature Stabiliz. : none Additional Information : 3.2 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : unknown Firmware Version : 2.8 6/8/1993 Elevation Cutoff Setting : 4 deg Date Installed : 1993-06-30T00:00Z Date Removed : 1994-11-23T00:00Z Temperature Stabiliz. : none Additional Information : 3.3 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : T338 Firmware Version : 3.0 10/10/1994 17:00:01 Elevation Cutoff Setting : 4 deg Date Installed : 1994-11-23T00:00Z Date Removed : 1999-05-17T00:00Z Temperature Stabiliz. : none Additional Information : 3.4 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : T338 Firmware Version : 3.2.32.8 Elevation Cutoff Setting : 4 deg Date Installed : 1999-05-17T00:00Z Date Removed : 2002-08-21T23:30Z Temperature Stabiliz. : none Additional Information : firmware update 3.5 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : T338 Firmware Version : 3.2.32.11 Elevation Cutoff Setting : 4 deg Date Installed : 2002-08-21T23:30Z Date Removed : 2002-08-28T00:00Z Temperature Stabiliz. : none Additional Information : firmware update 3.6 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : T390 Firmware Version : 3.2.32.11 Elevation Cutoff Setting : 4 deg Date Installed : 2002-08-28T00:00Z Date Removed : 2004-12-06T21:40Z Temperature Stabiliz. : none Additional Information : replace faulty receiver 3.7 Receiver Type : ROGUE SNR-8000 Satellite System : GPS Serial Number : T331 Firmware Version : 3.2.32.11 Elevation Cutoff Setting : 4 deg Date Installed : 2004-12-07T00:00Z Date Removed : 2007-02-07T21:00Z Temperature Stabiliz. : none Additional Information : replace faulty receiver 3.8 Receiver Type : ASHTECH UZ-12 Satellite System : GPS Serial Number : UC1200340013 Firmware Version : CQ00 Elevation Cutoff Setting : 4 deg Date Installed : 2007-02-09T00:00Z Date Removed : 2017-02-13T21:59Z Temperature Stabiliz. : none Additional Information : AOAD/M_T antenna powered through GPS : signal splitter. 3.9 Receiver Type : JAVAD TRE_G3TH DELTA Satellite System : GPS+GLO Serial Number : 01340 Firmware Version : 3.6.4 Elevation Cutoff Setting : 0 deg Date Installed : 2017-02-13T22:00Z Date Removed : 2017-06-29T23:59Z Temperature Stabiliz. : none Additional Information : 3.10 Receiver Type : JAVAD TRE_G3TH DELTA Satellite System : GPS+GLO+GAL+BDS Serial Number : 01340 Firmware Version : 3.6.4 Elevation Cutoff Setting : 0 deg Date Installed : 2017-06-30T00:00Z Date Removed : 2018-09-26T21:35Z Temperature Stabiliz. : none Additional Information : 3.11 Receiver Type : JAVAD TRE_G3TH DELTA Satellite System : GPS+GLO+GAL Serial Number : 01340 Firmware Version : 3.7.2 Elevation Cutoff Setting : 0 deg Date Installed : 2018-09-26T21:45Z Date Removed : 2019-05-06T18:09Z Temperature Stabiliz. : none Additional Information : 3.12 Receiver Type : JAVAD TRE_G3TH DELTA Satellite System : GPS+GLO+GAL Serial Number : 01340 Firmware Version : 3.7.6 Elevation Cutoff Setting : 0 deg Date Installed : 2019-05-06T18:09Z Date Removed : 2020-01-29T19:01Z Temperature Stabiliz. : none Additional Information : 3.13 Receiver Type : SEPT POLARX5 Satellite System : GPS+GLO+GAL+BDS Serial Number : 3013421 Firmware Version : 5.3.2 Elevation Cutoff Setting : 0 deg Date Installed : 2020-01-29T19:02Z Date Removed : 2021-02-02T22:20Z Temperature Stabiliz. : none Additional Information : 3.14 Receiver Type : SEPT POLARX5 Satellite System : GPS+GLO+GAL+BDS Serial Number : 3013421 Firmware Version : 5.4.0 Elevation Cutoff Setting : 0 deg Date Installed : 2021-02-02T22:20Z Date Removed : 2023-03-09T20:19Z Temperature Stabiliz. : none Additional Information : 3.15 Receiver Type : SEPT POLARX5 Satellite System : GPS+GLO+GAL+BDS Serial Number : 3013421 Firmware Version : 5.5.0 Elevation Cutoff Setting : 0 deg Date Installed : 2023-03-09T20:19Z Date Removed : (CCYY-MM-DDThh:mmZ) Temperature Stabiliz. : none Additional Information : 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 : AOAD/M_T JPLA Serial Number : 130 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0610 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : Antenna Radome Type : JPLA Radome Serial Number : Antenna Cable Type : Antenna Cable Length : Date Installed : 1993-03-05T00:00Z Date Removed : 2013-02-22T22:00Z Additional Information : clear acrylic "JPLA" dome info added 2002-08-22 : note that this is a correction, : not a new radome installation 4.2 Antenna Type : AOAD/M_T NONE Serial Number : 130 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0610 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : Antenna Cable Length : Date Installed : 2013-02-22T22:00Z Date Removed : 2013-08-09T00:41Z Additional Information : 4.3 Antenna Type : AOAD/M_T JPLA Serial Number : 130 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0610 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : Antenna Radome Type : JPLA Radome Serial Number : Antenna Cable Type : Antenna Cable Length : Date Installed : 2013-08-09T00:41Z Date Removed : 2013-12-11T18:00Z Additional Information : 4.4 Antenna Type : TPSCR.G3 SCIS Serial Number : 383-0152 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.6215 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : Antenna Radome Type : SCIS Radome Serial Number : 00191 Antenna Cable Type : Antenna Cable Length : Date Installed : 2013-12-11T18:00Z Date Removed : 2014-05-12T21:50Z Additional Information : Calibrated by Geo++, antenna height : was increased by 0.56049m from 0.061m. 4.5 Antenna Type : AOAD/M_T NONE Serial Number : 130 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0610 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : Antenna Cable Length : Date Installed : 2014-05-12T22:10Z Date Removed : 2014-09-03T00:00Z Additional Information : Before antenna installation, a new LNA : inal chokering body. 4.6 Antenna Type : AOAD/M_T JPLA Serial Number : 130 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0610 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : Antenna Radome Type : JPLA Radome Serial Number : Antenna Cable Type : Antenna Cable Length : Date Installed : 2014-09-03T00:01Z Date Removed : 2015-01-28T00:15Z Additional Information : Before antenna installation, a new LNA : was installed in original chokering body. 4.7 Antenna Type : TPSCR.G3 SCIS Serial Number : 383-0152 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.6219 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : Antenna Radome Type : SCIS Radome Serial Number : 00191 Antenna Cable Type : Antenna Cable Length : Date Installed : 2015-01-28T00:30Z Date Removed : 2019-09-26T13:17Z Additional Information : Calibrated by Geo++, antenna is mounted on a : stainless steel extended mast, positioned : directly above the mark. Antenna height was : increased by : a total of .56049 m from original .0614. : Old cable was removed on 2017-09-27T00:00Z. : New cable got re-routed and installed around : 00:30Z. The new cable is a Times Microwave LMR : 600, approx 150ft. 4.8 Antenna Type : JAVRINGANT_DM SCIS Serial Number : 02134 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.6219 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : SCIS Radome Serial Number : 1088 Antenna Cable Type : LMR600 Antenna Cable Length : 50 m Date Installed : 2019-09-26T13:24Z Date Removed : 2020-10-31T00:00Z Additional Information : Antenna is not calibrated 4.9 Antenna Type : JAVRINGANT_DM SCIS Serial Number : 02134 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.6219 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : SCIS Radome Serial Number : 1088 Antenna Cable Type : Times Microwave LMR240, single mode fiber-optic Antenna Cable Length : 61 m Date Installed : 2020-10-31T00:00Z Date Removed : (CCYY-MM-DDThh:mmZ) Additional Information : Antenna cable details added : Antenna is not calibrated : On 2020-10-31 the LMR600 coax cable was : replaced with an RF to fiber-optic system to : electrically isolate the antenna from the : receiver for lighting protection. A solar : powered RF-to-fiber transmitter was installed : near the antenna, connected by 10m of LMR240 : coax cable. 61m of fiber-optic cable connects : to the : Rf-to-fiber receiver at the GNSS receiver end. 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 5.1 Tied Marker Name : 7080-1988 Tied Marker Usage : MLRS (McDonald Laser Ranging Station) Tied Marker CDP Number : 7080 Tied Marker DOMES Number : 40442M006 Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : -22.394 dy (m) : -8.481 dz (m) : -23.406 Accuracy (mm) : Survey method : Date Measured : 1993-03-17T00:00Z Additional Information : 5.2 Tied Marker Name : 7850-1988 Tied Marker Usage : SLR and Mobile VLBI Tied Marker CDP Number : 7850 Tied Marker DOMES Number : 40442M008 Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : -9.521 dy (m) : 1.795 dz (m) : -1.484 Accuracy (mm) : Survey method : Date Measured : 1993-03-17T00:00Z Additional Information : 5.3 Tied Marker Name : 7851-1988 Tied Marker Usage : SLR Tied Marker CDP Number : 7851 Tied Marker DOMES Number : 40442M011 Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : -10.798 dy (m) : 2.416 dz (m) : -0.973 Accuracy (mm) : Survey method : Date Measured : 1993-03-17T00:00Z Additional Information : 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 : EXTERNAL CESIUM Input Frequency : 5.0 MHz Effective Dates : 1993-06-03/1997-08-26 Notes : 6.2 Standard Type : EXTERNAL XTAL VCO Input Frequency : 5.0 MHz Effective Dates : 1997-08-26/2002-08-21 Notes : Austron, <1us/day typ. 6.3 Standard Type : INTERNAL Input Frequency : 5.0 MHz Effective Dates : 2002-08-21/2002-08-28 Notes : steering off, exceeded VCO pulling range, : receiver needs repair/replacement 6.4 Standard Type : EXTERNAL XTAL VCO Input Frequency : 5.0 MHz Effective Dates : 2002-08-28/2016-07-20 Notes : Austron, <1us/day typ. Removal date is general : estimate. 6.5 Standard Type : EXTERNAL XTAL VCO Input Frequency : 5.0 MHz Effective Dates : 2016-07-20/2017-03-23 Notes : Stanford. Start date is an estimation, per : station POC. : Exact time unknown. 6.6 Standard Type : INTERNAL Input Frequency : 5.0 MHz Effective Dates : 2017-03-23/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 7.1 Instrumentation Type : SLR Status : PERMANENT Effective Dates : 1994-11-04/CCYY-MM-DD Notes : 7.2 Instrumentation Type : GRAVIMETER Status : PERMANENT Effective Dates : 2017-07-26/CCYY-MM-DD Notes : 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) 9.2.1 Multipath Sources : METAL SHED, GRAVIMETER Effective Dates : 2017-07-26/CCYY-MM-DD Additional Information : 12' x 12' flat facing surface approximately : 25' to the west 9.2.2 Multipath Sources : BUILDING Effective Dates : 2019-12-01/CCYY-MM-DD Additional Information : Satellite Laser Ranging operations : building.~ 25' x 25' metal structure, : ~60' SSW from monument. Building has : a dome on top, reaching ~ 30' high. : Start date of building is approximate. 9.2.3 Multipath Sources : 20' SHIPPING CONTAINER Effective Dates : 2020-02-03/CCYY-MM-DD Additional Information : Temporary storage to be used during : construction of nearby Satellite Laser : Ranging instrument. Closest edge of : container is located ~60 ft SSE of monument. 9.2.x Multipath Sources : (METAL ROOF/DOME/VLBI ANTENNA/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 9.3.1 Signal Obstructions : METAL SHED, GRAVIMETER Effective Dates : 2017-07-26/CCYY-MM-DD Additional Information : 12' x 12' flat facing surface approximately : 25' to the west 9.3.2 Signal Obstructions : BUILDING Effective Dates : 2019-12-01/CCYY-MM-DD Additional Information : Satellite Laser Ranging operations : building.~ 25' x 25' metal structure, : ~60' SSW from monument. Building has : a dome on top, reaching ~ 30' high. : Start date of building is approximate. 9.3.3 Signal Obstructions : 20' SHIPPING CONTAINER Effective Dates : 2020-02-03/CCYY-MM-DD Additional Information : Temporary storage to be used during : construction of nearby Satellite Laser : Ranging instrument. Closest edge of : container is located ~60 ft SSE of monument. 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 10.1 Date : 2012-02-09/2012-02-09 Event : Transitioned from .soc to .ash data types. For : soc data typed used soc2rnx to do the : conversion to RINEX data. For ash data types : using teqc directly to do the conversion to : RINEX. 10.2 Date : 2014-06-17/2014-06-17 Event : Locals installed the spike IAW the : configuration prior to 2013-12-11 antenna swap. 10.x Date : (CCYY-MM-DD/CCYY-MM-DD) Event : (TREE CLEARING/CONSTRUCTION/etc) 11. On-Site, Point of Contact Agency Information Agency : McDonald Observatory Preferred Abbreviation : MGO Mailing Address : 9 Lunar Circle : McDonald Observatory : Fort Davis, TX USA 79734 Primary Contact Contact Name : McDonald Observatory point of contact Telephone (primary) : 432-426-3735 Telephone (secondary) : Fax : E-mail : chevo@utexas.edu Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : 12. Responsible Agency (if different from 11.) Agency : Jet Propulsion Laboratory Preferred Abbreviation : JPL Mailing Address : 4800 Oak Grove Drive : Pasadena, CA 91109 USA Primary Contact Contact Name : JPL point of contact Telephone (primary) : 818-354-7055 Telephone (secondary) : Fax : 818-393-4965 E-mail : ggnops@jpl.nasa.gov Secondary Contact Contact Name : EarthScope point of contact Telephone (primary) : Telephone (secondary) : Fax : E-mail : ggn-ops@earthscope.org Additional Information : 13. More Information Primary Data Center : JPL Secondary Data Center : CDDIS URL for More Information : Hardcopy on File Site Map : Site Diagram : Horizon Mask : Monument Description : Site Pictures : Additional Information : Antenna Graphics with Dimensions --------- / \ | | +-------------------------------------------------+ <-- 0.1015 TCR | | | | | | | | +-+-------------------------------------------------+-+ <-- 0.0379 +-------------------+-------------+-------------------+ <-- 0.0345 BCR | | | | +------x------+ <-- 0.0000 BPA=ARP NOM=NRP <-- 0.3800 -->