The NGS Data Sheet
See file dsdata.pdf for more information about the datasheet.
PROGRAM = datasheet95, VERSION = 8.12.5.19
Starting Datasheet Retrieval...
1 National Geodetic Survey, Retrieval Date = FEBRUARY 20, 2025 02:33:47 EST
AF9522 ***********************************************************************
AF9522 HT_MOD - This is a Height Modernization Survey Station.
AF9522 CORS - This is a GPS Continuously Operating Reference Station.
AF9522 DESIGNATION - GAITHERSBURG CORS ARP
AF9522 CORS_ID - GAIT
AF9522 PID - AF9522
AF9522 STATE/COUNTY- MD/MONTGOMERY
AF9522 COUNTRY - US
AF9522 USGS QUAD - GAITHERSBURG (2016)
AF9522
AF9522 *CURRENT SURVEY CONTROL
AF9522 ______________________________________________________________________
AF9522* NAD 83(2011) POSITION- 39 08 02.34020(N) 077 13 15.51824(W) ADJUSTED
AF9522* NAD 83(2011) ELLIP HT- 108.917 (meters) (06/??/19) ADJUSTED
AF9522* NAD 83(2011) EPOCH - 2010.00
AF9522* NAVD 88 ORTHO HEIGHT - 140.66 (meters) 461.5 (feet) GPS OBS
AF9522 ______________________________________________________________________
AF9522 NAVD 88 orthometric height was determined with an earlier geoid model
AF9522 GEOID HEIGHT - -31.746 (meters) GEOID18
AF9522 NAD 83(2011) X - 1,095,790.791 (meters) COMP
AF9522 NAD 83(2011) Y - -4,831,328.037 (meters) COMP
AF9522 NAD 83(2011) Z - 4,003,934.390 (meters) COMP
AF9522
AF9522 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
AF9522 Standards:
AF9522 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
AF9522 Horiz Ellip SD_N SD_E SD_h (unitless)
AF9522 -------------------------------------------------------------------
AF9522 NETWORK 0.11 0.32 0.04 0.04 0.16 -0.00264600
AF9522 -------------------------------------------------------------------
AF9522
AF9522.The coordinates were established by GPS observations
AF9522.and adjusted by the National Geodetic Survey in June 2019.
AF9522
AF9522.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
AF9522.been affixed to the stable North American Tectonic Plate.
AF9522
AF9522.The coordinates are valid at the epoch date displayed above
AF9522.which is a decimal equivalence of Year/Month/Day.
AF9522
AF9522.Due to the release of the International GNSS Service (IGS) 2014
AF9522.realization of the International Terrestrial Reference Frame of 2014
AF9522.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
AF9522.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
AF9522.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
AF9522.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
AF9522.currently published epoch of 2010.00.
AF9522
AF9522.Additional information on MYCS2 is available at
AF9522.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
AF9522
AF9522.The orthometric height was determined by GPS observations and a
AF9522.high-resolution geoid model using precise GPS observation and
AF9522.processing techniques.
AF9522
AF9522.Significant digits in the geoid height do not necessarily reflect accuracy.
AF9522.GEOID18 height accuracy estimate available here.
AF9522
AF9522.The PID for the CORS L1 Phase Center is DJ3083.
AF9522
AF9522.Click photographs - Photos may exist for this station.
AF9522
AF9522.The XYZ, and position/ellipsoidal ht. are equivalent.
AF9522
AF9522.The ellipsoidal height was determined by GPS observations
AF9522.and is referenced to NAD 83.
AF9522
AF9522. The following values were computed from the NAD 83(2011) position.
AF9522
AF9522; North East Units Scale Factor Converg.
AF9522;SPC MD - 162,903.074 380,894.470 MT 0.99995997 -0 08 19.3
AF9522;SPC MD - 534,457.84 1,249,651.27 sFT 0.99995997 -0 08 19.3
AF9522;UTM 18 - 4,333,993.895 308,035.032 MT 1.00005376 -1 24 07.8
AF9522
AF9522! - Elev Factor x Scale Factor = Combined Factor
AF9522!SPC MD - 0.99998291 x 0.99995997 = 0.99994288
AF9522!UTM 18 - 0.99998291 x 1.00005376 = 1.00003667
AF9522
AF9522_U.S. NATIONAL GRID SPATIAL ADDRESS: 18SUJ0803533993(NAD 83)
AF9522
AF9522 SUPERSEDED SURVEY CONTROL
AF9522
AF9522 ELLIP H (06/27/12) 108.918 (m) GP(2010.00) 0 0
AF9522 NAD 83(2011)- 39 08 02.34023(N) 077 13 15.51810(W) AD(2010.00) c
AF9522 NAD 83(2011)- 39 08 02.34022(N) 077 13 15.51820(W) AD(2010.00) c
AF9522 ELLIP H (08/??/11) 108.914 (m) GP(2010.00) c c
AF9522 ELLIP H (02/10/07) 108.944 (m) GP(2002.00)
AF9522 NAD 83(2007)- 39 08 02.34046(N) 077 13 15.51884(W) AD(2002.00) c
AF9522 NAD 83(CORS)- 39 08 02.34046(N) 077 13 15.51884(W) AD(2002.00) c
AF9522 ELLIP H (03/??/02) 108.944 (m) GP(2002.00) c c
AF9522 NAD 83(CORS)- 39 08 02.34059(N) 077 13 15.51925(W) AD(1997.00) c
AF9522 ELLIP H (01/??/01) 108.937 (m) GP(1997.00) c c
AF9522 NAD 83(CORS)- 39 08 02.34060(N) 077 13 15.51927(W) AD(1997.00) c
AF9522 ELLIP H (04/??/96) 108.937 (m) GP(1997.00) c c
AF9522 NAD 83(CORS)- 39 08 02.34060(N) 077 13 15.51927(W) AD(1996.00) c
AF9522 ELLIP H (04/??/96) 108.937 (m) GP(1996.00) c c
AF9522
AF9522.Superseded values are not recommended for survey control.
AF9522
AF9522.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
AF9522.See file dsdata.pdf to determine how the superseded data were derived.
AF9522
AF9522_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
AF9522
AF9522 STATION DESCRIPTION
AF9522
AF9522'DESCRIBED BY NATIONAL GEODETIC SURVEY 2019
AF9522'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
AF9522'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
AF9522'ACCESSIBLE AT THE WORLDWIDE WEB.
AF9522'https://geodesy.noaa.gov/CORS/data.shtml
AF9522'https://geodesy.noaa.gov/CORS
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