USNO Site Information Form NGS Continuously Operating Reference Station See Instructions at: ftp://www.igs.org/pub/station/general/sitelog_instr.txt 0. Form Prepared by (full name) : cors-adm Date Prepared : 2015-03-26 Report Type : UPDATE If Update: Previous Site Log : usno_20141215.log Modified/Added Sections : 1 2 1. Site Identification of the GNSS Monument Site Name : U.S. Naval Observ Four Character ID : USNO Monument Inscription : no monument, ARP IERS DOMES Number : 40451S003 CDP Number : NONE Monument Description : Rod in a mortar rooftop parapet Height of the Monument : (m) Monument Foundation : (STEEL RODS, CONCRETE BLOCK, ROOF, etc) Foundation Depth : (m) Marker Description : (CHISELLED CROSS/DIVOT/BRASS NAIL/etc) Date Installed : 1997-04-24T00:00Z Geologic Characteristic : on edge of roof of 3-story building 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 : (multiple lines) : The antenna is mounted near the edge of the : roof (flat) of Building 52 (3 stories) at : the U.S. Naval Observatory inside Washington, : DC. There are no nearby geodetic markers or : control points. 2. Site Location Information City or Town : Washington State or Province : District of Columbia Country : United States Tectonic Plate : North American Approximate Position (ITRF) X coordinate (m) : 1112189.773 Y coordinate (m) : -4842955.026 Z coordinate (m) : 3985352.266 Latitude (N is +) : +385508.27 Longitude (E is +) : -0770358.41 Elevation (m,ellips.) : 48.9 Additional Information : ARP IGS08 POSITION (EPOCH 2005.00) : Published by the IGS in Nov 2010. 3. GNSS Receiver Information 3.1 Receiver Type : ROGUE SNR-12 RM Satellite System : GPS Serial Number : T246 Firmware Version : 3.2.32.4 Elevation Cutoff Setting : (deg) Date Installed : 1997-04-24 Date Removed : 1999-08-13T14:46Z Temperature Stabiliz. : (none or tolerance in degrees C) Additional Information : 24-APR-1997 to 12-AUG-1998 : the clock vault of Bldg 52A. The space is : environmental controlled but not stringently. : 12-AUG-1998 to present : environmentally controlled chamber within the : clock vault (Bldg 52A); specs are +/- 0.15 C : for temp. and +/- 1% for rel. humidity. 3.2 Receiver Type : ROGUE SNR-12 RM Satellite System : GPS Serial Number : T246 Firmware Version : 3.2.32.9 Elevation Cutoff Setting : (deg) Date Installed : 1999-08-13T14:46Z Date Removed : 1999-10-26T19:00Z Temperature Stabiliz. : (none or tolerance in degrees C) Additional Information : firmware update only; no other change 3.3 Receiver Type : AOA SNR-12 ACT Satellite System : GPS Serial Number : 245-U Firmware Version : 3.3.32.3 Elevation Cutoff Setting : (deg) Date Installed : 1999-10-26T20:15Z Date Removed : 1999-11-29T15:50Z Temperature Stabiliz. : (none or tolerance in degrees C) Additional Information : continues to be located in environmentally : controlled chamber 3.4 Receiver Type : AOA SNR-12 ACT Satellite System : GPS Serial Number : 246-U Firmware Version : 3.3.32.3 Elevation Cutoff Setting : (deg) Date Installed : 1999-11-29T16:10Z Date Removed : 2000-06-29T15:15Z Temperature Stabiliz. : (none or tolerance in degrees C) Additional Information : continues to be located in environmentally : controlled chamber 3.5 Receiver Type : AOA SNR-12 ACT Satellite System : GPS Serial Number : 246-U Firmware Version : 3.3.32.4 Elevation Cutoff Setting : (deg) Date Installed : 2000-06-29T15:15Z Date Removed : 2002-03-12T15:15Z Temperature Stabiliz. : (none or tolerance in degrees C) Additional Information : firmware update only; no other change 3.6 Receiver Type : ASHTECH Z-XII3T Satellite System : GPS Serial Number : RT919994503 Firmware Version : 1L01-1D04 Elevation Cutoff Setting : (deg) Date Installed : 2002-03-12T15:35Z Date Removed : 2008-08-19T16:07Z Temperature Stabiliz. : (none or tolerance in degrees C) Additional Information : no other changes (environmentally controlled : chamber still in use) 3.7 Receiver Type : ASHTECH Z-XII3T Satellite System : GPS Serial Number : RT920013104 Firmware Version : 1L01-1D04 Beta Elevation Cutoff Setting : 5 Date Installed : 2008-08-19T16:07Z Date Removed : 2009-09-18T00:00Z Temperature Stabiliz. : (none or tolerance in degrees C) Additional Information : no other changes (environmentally controlled : chamber still in use) 3.8 Receiver Type : ASHTECH Z-XII3T Satellite System : GPS Serial Number : RT919994503 Firmware Version : 1L01-1D04 Elevation Cutoff Setting : 10 Date Installed : 2009-09-19T00:00Z Date Removed : (CCYY-MM-DDThh:mmZ) Temperature Stabiliz. : (none or tolerance in degrees C) Additional Information : (environmentally controlled chamber still : in use) 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 NONE Serial Number : 309 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0000 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : oriented North but not measured Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : (vendor & type number) Antenna Cable Length : (m) Date Installed : 1997-04-24 Date Removed : 1998-11-12 Additional Information : (multiple lines) 4.2 Antenna Type : AOAD/M_T NONE Serial Number : 309 Antenna Reference Point : BPA Marker->ARP Up Ecc. (m) : 0.0000 Marker->ARP North Ecc(m) : 0.0000 Marker->ARP East Ecc(m) : 0.0000 Alignment from True N : oriented North but not measured Antenna Radome Type : NONE Radome Serial Number : Antenna Cable Type : (vendor & type number) Antenna Cable Length : (m) Date Installed : 1998-11-12 Date Removed : (CCYY-MM-DDThh:mmZ) Additional Information : Antenna removed at ~13:45 UTC to repair the : parapet coping (painted metal) on the roof : edge immediately below the antenna. The : same antenna was reinstalled in the same : location about 30 minutes later. : Antenna cable changed on 14-OCT-1999. The : cable type (Andrew FSJ1-50A) and specs : remain unchanged. 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 : none Tied Marker Usage : (SLR/VLBI/LOCAL CONTROL/FOOTPRINT/etc) Tied Marker CDP Number : none Tied Marker DOMES Number : Differential Components from GNSS Marker to the tied monument (ITRS) dx (m) : dy (m) : dz (m) : Accuracy (mm) : (mm) Survey method : (GPS CAMPAIGN/TRILATERATION/TRIANGULATION/etc) Date Measured : (CCYY-MM-DDThh:mmZ) Additional Information : (multiple lines) 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 : steered H-MASER Input Frequency : 5 MHz Effective Dates : 1997-04-24/CCYY-MM-DD Notes : reference signal from an H-maser (MC3) located : in Bldg 52 which is steered to the USNO Master : Clock (MC2), the realization of UTC(USNO); : calibration data for MC3-MC2 are available; : calibration of clock offset between MC3 and : GPS receiver being investigated. Cable for 5MHz : signal is RG-223 with thermal coeff. of 3000 : PPM over (+10 to 30 C range) or 150 PPM/C. The : 1 PPS output signal is monitored and compared : with reference to determine clock offsets when : receiver resets. : On 12-NOV-1988 the trigger level for the 1 PPS : monitoring was changed from 1 V to 0.5 V. 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 : Effective Dates : (CCYY-MM-DD/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 : Lithium chloride dew point units Manufacturer : Honeywell probes/General Eastern units; Serial Number : Data Sampling Interval : 10 sec Accuracy (% rel h) : dew point to 5 deg F Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (1997-04-24/2001-06-13) Notes : probes are treated with lithium chloride : activated solution and dried 8.1.2 Humidity Sensor Model : Thin film capacitor Manufacturer : RainWise Remote Weather Data Logger Serial Number : Data Sampling Interval : 5 min Accuracy (% rel h) : 2% at 25 C Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (2001-06-15/2001-07-25) Notes : 8.1.3 Humidity Sensor Model : Weather Report Logger (WRL-25) Manufacturer : Texas Weather Instruments Serial Number : Data Sampling Interval : 5 min Accuracy (% rel h) : 2% Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (2001-07-25/2001-08-21) Notes : 8.1.4 Humidity Sensor Model : HUMICA H-sensor (pn 16663) Manufacturer : Vaisala Serial Number : Data Sampling Interval : 15 seconds Accuracy (% rel h) : +/-1%(0...90%RH) Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : 2001-08-21/CCYY-MM-DD Notes : NOAA GSOS # 062 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 : Digital barometer (model 361) Manufacturer : Setra Serial Number : Data Sampling Interval : 10 sec Accuracy : 0.1 mm mercury Height Diff to Ant : unknown Calibration date : (CCYY-MM-DD) Effective Dates : (1997-04-24/2001-06-13) Notes : all met sensors are located at USNO in : Building 7 (the Transit House for 6-inch : transit circle); air temp, air pressure, and : dew point read every 10 seconds; contact for : met data is Theodore J. Rafferty, Astrometry : Dept., USNO (TJR@sicon.usno.navy.mil) 8.2.2 Pressure Sensor Model : Digital barometer Manufacturer : RainWise Remote Weather Data Logger Serial Number : Data Sampling Interval : 5 min Accuracy : 0.1 mbar Height Diff to Ant : unknown Calibration date : (CCYY-MM-DD) Effective Dates : (2001-06-15/2001-07-25) Notes : met sensors are located at USNO on rooftop : of Building 78 (Time Service) 8.2.3 Pressure Sensor Model : Weather Report Logger (WRL-25) Manufacturer : Texas Weather Instruments Serial Number : Data Sampling Interval : 5 min Accuracy : 10 mbar Height Diff to Ant : unknown Calibration date : (CCYY-MM-DD) Effective Dates : (2001-07-25/2001-08-21) Notes : met sensors are located at USNO on rooftop : of Building 78 (Time Service) 8.2.4 Pressure Sensor Model : PTB220 Manufacturer : Vaisala Serial Number : Data Sampling Interval : 15 seconds Accuracy : +/-0.1 mbar Height Diff to Ant : -0.724 m Calibration date : (CCYY-MM-DD) Effective Dates : 2001-08-21/CCYY-MM-DD Notes : met sensors are located at USNO on rooftop : of Building 52A (opposite end from GPS ant) : NOAA GSOS # 062 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 : Platium Res Probes (model CT-807-A) Manufacturer : Hy-cal Serial Number : Data Sampling Interval : 10 sec Accuracy : (deg C) Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (1997-04-24/2001-06-13) Notes : (multiple lines) 8.3.2 Temp. Sensor Model : temperature sensor Manufacturer : RainWise Remote Weather Data Logger Serial Number : Data Sampling Interval : 5 min Accuracy : 0.3 C Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (2001-06-15/2001-07-25) Notes : (multiple lines) 8.3.3 Temp. Sensor Model : Weather Report Logger (WRL-25) Manufacturer : Texas Weather Instruments Serial Number : Data Sampling Interval : 5 min Accuracy : 0.4 C Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : (2001-07-25/2001-08-21) Notes : (multiple lines) 8.3.4 Temp. Sensor Model : PT100 RTD 1/s DIN 43760B Manufacturer : Vaisala Serial Number : Data Sampling Interval : 15 seconds Accuracy : +/-0.1 @ 20.0C Aspiration : (UNASPIRATED/NATURAL/FAN/etc) Height Diff to Ant : (m) Calibration date : (CCYY-MM-DD) Effective Dates : 2001-08-21/CCYY-MM-DD Notes : NOAA GSOS # 062 8.3.x Temp. Sensor Model : Manufacturer : Serial Number : Data Sampling Interval : (sec) Accuracy : (hPa) 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 : none 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 : The USNO backup Master Clock is located in the 8.5.x Other Instrumentation : 9. Local Ongoing Conditions Possibly Affecting Computed Position 9.1.x Radio Interferences : (TV/CELL PHONE ANTENNA/RADAR/etc) Observed Degredations : (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/BUILDLINGS/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 : U.S. Naval Observatory Preferred Abbreviation : USNO Mailing Address : TS Dept. : 3450 Massachusetts Ave., NW : Washington, DC 20392-5420 Primary Contact Contact Name : Edward Powers (USNO) Telephone (primary) : 202-762-1451 Telephone (secondary) : Fax : 202-762-1511 E-mail : edward.powers@usno.navy.mil Secondary Contact Contact Name : Blair Fonville Telephone (primary) : 202-762-1450 Telephone (secondary) : Fax : E-mail : blair.fonville@usno.navy.mil Additional Information : (Additional Information) 12. Responsible Agency (if different from 11.) Agency : U.S. Naval Observatory Preferred Abbreviation : USNO Mailing Address : TS Dept. : 3450 Massachusetts Ave., NW : Washington, DC 20392-5420 Primary Contact Contact Name : Giovanni Sella NOAA-NGS Telephone (primary) : 301-713-3198x126 Telephone (secondary) : 301-713-2845 Fax : 301-713-4475 E-mail : ngs.corscollector@noaa.gov Secondary Contact Contact Name : Edward Powers USNO Telephone (primary) : 202-762-1451 Telephone (secondary) : Fax : 202-762-1511 E-mail : edward.powers@usno.navy.mil Additional Information : NOAA-NGS only facilitates data flow 13. More Information Primary Data Center : ftp://geodesy.noaa.gov/cors Secondary Data Center : ftp://alt.ngs.noaa.gov/cors URL for More Information : http://geodesy.noaa.gov/CORS Hardcopy on File Site Map : (Y or URL) Site Diagram : N Horizon Mask : N Monument Description : no monument Site Pictures : N Additional Information : (multiple lines) Antenna Graphics with Dimensions TurboRogue: DORNE MARGOLIN T (AOAD/M_T) ----- / + \ <-- 0.128 L2 | + | <-- 0.110 L1 +--------------------------------------------------+ <-- 0.102 TCR | : | | : | | : | | : | +-+--------------------------------------------------+-+ <-- 0.038 +-------------------+-------------+--------------------+ <-- 0.035 BCR | | =| | +------x------+ <-- 0.000 ARP <-- 0.381 --> ARP: Antenna Reference Point L1 : L1 Phase Center L2 : L2 Phase Center TCR: Top of Chokering BCR: Bottom of Chokering