MRC100USA 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) : Jake Griffiths Date Prepared : 2020-09-25 Report Type : UPDATE If Update: Previous Site Log : mrc1_20200312.log Modified/Added Sections : 4.1 1. Site Identification of the GNSS Monument Site Name : NRL Midway Research Center (Stafford) Nine Character ID : MRC100USA Monument Inscription : IERS DOMES Number : 49654M002 CDP Number : none Monument Description : DEEP DRILL BRACED MONUMENT Height of the Monument : Monument Foundation : Foundation Depth : Marker Description : SCIGN MOUNT MARK Date Installed : 2017-07-26T00:00Z Geologic Characteristic : SAND/CLAY Bedrock Type : Bedrock Condition : Fracture Spacing : Fault zones nearby : Distance/activity : Additional Information : LINE OF SIGHT TO SLR 2. Site Location Information City or Town : Stafford State or Province : Virginia Country or Region : Tectonic Plate : NORTH AMERICAN Approximate Position (ITRF) X coordinate (m) : 1092811.8197 Y coordinate (m) : -4877221.9707 Z coordinate (m) : 3948968.1090 Latitude (N is +) : +382956.76 Longitude (E is +) : +2823745.66 Elevation (m,ellips.) : 27.2 Additional Information : 3. GNSS Receiver Information 3.1 Receiver Type : SEPT POLARX5 Satellite System : GPS+GLO+GAL+BDS Serial Number : 3016634 Firmware Version : 5.1.1 Elevation Cutoff Setting : 0 deg Date Installed : 2017-07-26T00:00Z Date Removed : 2019-03-12T18:43Z Temperature Stabiliz. : 20 C Additional Information : Inside outbuilding with forced air conditioning : ** 2023-03-31 SLM 2.0 altered field temp_stab : from its original value: ~20 C 3.2 Receiver Type : SEPT POLARX5 Satellite System : GPS+GLO+GAL+BDS Serial Number : 3016634 Firmware Version : 5.2.0 Elevation Cutoff Setting : 0 deg Date Installed : 2019-03-12T18:44Z Date Removed : 2019-09-30T17:30Z Temperature Stabiliz. : 20 C Additional Information : Inside outbuilding with forced air conditioning : ** 2023-03-31 SLM 2.0 altered field temp_stab : from its original value: ~20 C 3.3 Receiver Type : SEPT POLARX5 Satellite System : GPS+GLO+GAL+BDS Serial Number : 3016634 Firmware Version : 5.3.0 Elevation Cutoff Setting : 0 deg Date Installed : 2019-09-30T17:30Z Date Removed : 2020-03-12T18:47Z Temperature Stabiliz. : 20 C Additional Information : Inside outbuilding with forced air conditioning : ** 2023-03-31 SLM 2.0 altered field temp_stab : from its original value: ~20 C 3.4 Receiver Type : SEPT POLARX5 Satellite System : GPS+GLO+GAL+BDS Serial Number : 3016634 Firmware Version : 5.3.2 Elevation Cutoff Setting : 0 deg Date Installed : 2020-03-12T18:47Z Date Removed : (CCYY-MM-DDThh:mmZ) Temperature Stabiliz. : 20 C 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 : SEPCHOKE_B3E6 SPKE Serial Number : 5150 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0083 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : 0 deg Antenna Radome Type : SPKE Radome Serial Number : Antenna Cable Type : LMR600 Antenna Cable Length : 45 m Date Installed : 2017-07-26T00:00Z 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 : 2017-07-26/2019-06-20 Notes : 6.2 Standard Type : EXTERNAL H-MASER Input Frequency : 10.0 MHz Effective Dates : 2019-06-20/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 : 2002-08-01/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 8.1.1 Humidity Sensor Model : WXT536 Manufacturer : Vaisala Serial Number : N2130569 Data Sampling Interval : Accuracy (% rel h) : Aspiration : Height Diff to Ant : Calibration date : Effective Dates : 2017-07-26/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 : WXT536 Manufacturer : Vaisala Serial Number : N2130569 Data Sampling Interval : Accuracy : Height Diff to Ant : Calibration date : Effective Dates : 2017-07-26/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 : WXT536 Manufacturer : Vaisala Serial Number : N2130569 Data Sampling Interval : Accuracy : Aspiration : Height Diff to Ant : Calibration date : Effective Dates : 2017-07-26/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 10.1 Date : 2017-09-15/2017-09-15 Event : Installed concrete retaining wall blocks around : base of DDBM to protect from commercial mowers. : The blocks are each about 20 cm thick, and the : wall is two layers tall. 10.2 Date : 2018-05-02/2018-05-02 Event : Planted low-lying blue juniper ground cover : beneath antenna and within the circular : retaining wall to keep animals from digging. : Had been keeping weeds out of this box, but the : bare ground attracted a few burrowing animals. 10.x Date : (CCYY-MM-DD/CCYY-MM-DD) Event : (TREE CLEARING/CONSTRUCTION/etc) 11. On-Site, Point of Contact Agency Information Agency : U.S. Naval Research Laboratory Preferred Abbreviation : NRL Mailing Address : 4555 Overlook Ave SW : Washington, DC 20375 Primary Contact Contact Name : Jake Griffiths Telephone (primary) : 202-404-3508 Telephone (secondary) : 703-551-1876 Fax : 202-404-2248 E-mail : jake.griffiths@nrl.navy.mil Secondary Contact Contact Name : Reed Smith Telephone (primary) : 202-767-3305 Telephone (secondary) : 703-551-1876 Fax : 202-404-2248 E-mail : reed.smith@nrl.navy.mil Additional Information : 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 : CDDIS Secondary Data Center : NONE URL for More Information : Hardcopy on File Site Map : Site Diagram : Horizon Mask : Monument Description : Site Pictures : Additional Information : Antenna Graphics with Dimensions