HNP200USA Site Information Form (site log) NGS Foundation Continuously Operating Reference Station See Instructions at: https://files.igs.org/pub/station/general/sitelog_instr.txt 0. Form Prepared by (full name) : John Galetzka Date Prepared : 2025-03-24 Report Type : UPDATE If Update: Previous Site Log : hnp2_20250211.log Modified/Added Sections : (n.n,n.n,...) 1. Site Identification of the GNSS Monument Site Name : UMD HORN POINT 2 Nine Character ID : HNP200USA Monument Inscription : IERS DOMES Number : (A9) CDP Number : (A4) Monument Description : Deep-Drilled Braced Monument Height of the Monument : 1.65 m Monument Foundation : Five legs of 1.25-inch stainless steel schedule 80 pipe, : 1 vertical, 4 diagonal. Foundation Depth : 10 m Marker Description : The marker (aka Geodetic Reference Point) of the : SCIGN D3 Antenna Adaptor for both the vertical : and horizontal measurements is the divoted/ : rounded top of the Center Support Screw, visible : when the Top Plate/Antenna assembly is removed. : As the two parts that are between the Center : Support Screw and the base of the antenna (the : Antenna Bolt and the Top Plate) are machined, : the adaptor is a "fixed-height" fixture, : with reference height of 0.0083 m. Date Installed : 2025-02-01 Geologic Characteristic : Mesoproterozoic gneiss covered with 1 m of regolith : containing weathered-out gravel and cobbles. Bedrock Type : METAMORPHIC Bedrock Condition : FRESH, JOINTED 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 : Monument built by contractors from Riggs and : Distler under the guidance of John Galetzka, NGS. : Solar panels and equipment enclosure installed by : contractors from Riggs and Distler, and NV5. 2. Site Location Information City or Town : Cambridge State or Province : Maryland Country : United States of America (the) Tectonic Plate : North American Approximate Position (ITRF) X coordinate (m) : 1196617.897 Y coordinate (m) : -4846360.635 Z coordinate (m) : 3956717.595 Latitude (N is +) : +383519.59 Longitude (E is +) : -0760749.70 Elevation (m,ellips.) : -31.3 Additional Information : ARP ITRF2014 POSITION (EPOCH 2010.00) : Computed in Feb 2025 using 18 days of data. 3. GNSS Receiver Information 3.1 Receiver Type : SEPT POLARX5 Satellite System : GPS+GLO+GAL+BDS Serial Number : 3079561 Firmware Version : 5.4.0-patch1 Elevation Cutoff Setting : 0 deg Date Installed : 2025-02-09 Date Removed : (CCYY-MM-DDThh:mmZ) Temperature Stabiliz. : (none or tolerance in degrees C) 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 : TWIVC6050 SCIT Serial Number : 0152202202070005 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 : SCIT Radome Serial Number : Antenna Cable Type : LMR-400 Antenna Cable Length : 10 m Date Installed : 2025-02-09 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 or EXTERNAL H-MASER/CESIUM/etc) Input Frequency : (if external) Effective Dates : (CCYY-MM-DD/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 : GNSS Status : PERMANENT Effective Dates : 2001-08-15 Notes : UVFM00USA using a concrete pillar monument. 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 : U0411317 Data Sampling Interval : Accuracy (% rel h) : Aspiration : Height Diff to Ant : 0.5 m Calibration date : (CCYY-MM-DD) Effective Dates : 2025-02-05 Notes : (multiple lines) 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 : U0411317 Data Sampling Interval : Accuracy : Height Diff to Ant : 0.5 m Calibration date : (CCYY-MM-DD) Effective Dates : 2025-02-05 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) 8.3.1 Temp. Sensor Model : WXT536 Manufacturer : Vaisala Serial Number : U0411317 Data Sampling Interval : Accuracy : Aspiration : Height Diff to Ant : 0.5 m Calibration date : (CCYY-MM-DD) Effective Dates : 2025-02-05 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) 8.4.1 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) 8.4.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) 8.5.1 Other Instrumentation : (multiple lines) 8.5.x Other Instrumentation : (multiple lines) 9. Local Ongoing Conditions Possibly Affecting Computed Position 9.1.1 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) 9.1.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 ROOF/DOME/VLBI ANTENNA/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) 9.3.1 Signal Obstructions : (TREES/BUILDLINGS/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 9.3.x Signal Obstructions : (TREES/BUILDLINGS/etc) Effective Dates : (CCYY-MM-DD/CCYY-MM-DD) Additional Information : (multiple lines) 10. Local Episodic Effects Possibly Affecting Data Quality 10.1 Date : 2025-03-04/2025-03-04 Event : TREE CLEARING 10.x Date : (CCYY-MM-DD/CCYY-MM-DD) Event : (TREE CLEARING/CONSTRUCTION/etc) 11. On-Site, Point of Contact Agency Information Agency : University of Maryland Center for Preferred Abbreviation : Environmental Studies Horn Point Laboratory Mailing Address : UMCES : 2020 Horns Point Road : Cambridge, MD 21613 Primary Contact Contact Name : Jason Beveridge Telephone (primary) : 410-221-8374 Telephone (secondary) : Fax : E-mail : jbeveridge@umces.edu Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : (multiple lines) 12. Responsible Agency (if different from 11.) Agency : NOAA-National Geodetic Survey Preferred Abbreviation : NOAA-NGS Mailing Address : NOAA, N/NGS6, SSMC3-9111 : 1315 East-West Hwy. : Silver Spring, MD 20910, USA Primary Contact Contact Name : cors-adm Telephone (primary) : Telephone (secondary) : Fax : E-mail : ngs.corscollector@noaa.gov Secondary Contact Contact Name : Telephone (primary) : Telephone (secondary) : Fax : E-mail : Additional Information : (multiple lines) 13. More Information Primary Data Center : https://geodesy.noaa.gov/corsdata/ Secondary Data Center : URL for More Information : https://geodesy.noaa.gov/CORS/ 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 https://files.igs.org/pub/station/general/antenna.gra