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 19, 2025 13:50:31 EST
DM3975 ***********************************************************************
DM3975 CORS - This is a GPS Continuously Operating Reference Station.
DM3975 DESIGNATION - WALLACE COMM COLL CORS ARP
DM3975 CORS_ID - ALSE
DM3975 PID - DM3975
DM3975 STATE/COUNTY- AL/DALLAS
DM3975 COUNTRY - US
DM3975 USGS QUAD - SELMA (2018)
DM3975
DM3975 *CURRENT SURVEY CONTROL
DM3975 ______________________________________________________________________
DM3975* NAD 83(2011) POSITION- 32 26 50.68923(N) 087 00 42.37677(W) ADJUSTED
DM3975* NAD 83(2011) ELLIP HT- 31.123 (meters) (06/??/19) ADJUSTED
DM3975* NAD 83(2011) EPOCH - 2010.00
DM3975* NAVD 88 ORTHO HEIGHT - 59.416 (meters) 194.93 (feet) ADJUSTED
DM3975 ______________________________________________________________________
DM3975 GEOID HEIGHT - -28.322 (meters) GEOID18
DM3975 NAD 83(2011) X - 280,861.349 (meters) COMP
DM3975 NAD 83(2011) Y - -5,380,303.298 (meters) COMP
DM3975 NAD 83(2011) Z - 3,402,420.136 (meters) COMP
DM3975 VERT ORDER - SECOND CLASS I
DM3975
DM3975 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
DM3975 Standards:
DM3975 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
DM3975 Horiz Ellip SD_N SD_E SD_h (unitless)
DM3975 -------------------------------------------------------------------
DM3975 NETWORK 0.18 0.26 0.04 0.09 0.13 0.06160100
DM3975 -------------------------------------------------------------------
DM3975
DM3975.The coordinates were established by GPS observations
DM3975.and adjusted by the National Geodetic Survey in June 2019.
DM3975
DM3975.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DM3975.been affixed to the stable North American Tectonic Plate.
DM3975
DM3975.The coordinates are valid at the epoch date displayed above
DM3975.which is a decimal equivalence of Year/Month/Day.
DM3975
DM3975.Due to the release of the International GNSS Service (IGS) 2014
DM3975.realization of the International Terrestrial Reference Frame of 2014
DM3975.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DM3975.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DM3975.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DM3975.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DM3975.currently published epoch of 2010.00.
DM3975
DM3975.Additional information on MYCS2 is available at
DM3975.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DM3975
DM3975.The orthometric height was determined by differential leveling and
DM3975.adjusted by the NATIONAL GEODETIC SURVEY
DM3975.in August 2012.
DM3975
DM3975.No vertical observational check was made to the station.
DM3975
DM3975.Significant digits in the geoid height do not necessarily reflect accuracy.
DM3975.GEOID18 height accuracy estimate available here.
DM3975
DM3975.The PID for the CORS L1 Phase Center is DM3976.
DM3975
DM3975.Click photographs - Photos may exist for this station.
DM3975
DM3975.The XYZ, and position/ellipsoidal ht. are equivalent.
DM3975
DM3975.The ellipsoidal height was determined by GPS observations
DM3975.and is referenced to NAD 83.
DM3975
DM3975. The following values were computed from the NAD 83(2011) position.
DM3975
DM3975; North East Units Scale Factor Converg.
DM3975;SPC AL W - 271,439.916 645,906.006 MT 0.99995931 +0 15 43.0
DM3975;UTM 16 - 3,590,029.940 498,893.568 MT 0.99960002 -0 00 22.7
DM3975
DM3975! - Elev Factor x Scale Factor = Combined Factor
DM3975!SPC AL W - 0.99999511 x 0.99995931 = 0.99995442
DM3975!UTM 16 - 0.99999511 x 0.99960002 = 0.99959514
DM3975
DM3975_U.S. NATIONAL GRID SPATIAL ADDRESS: 16SDA9889390029(NAD 83)
DM3975
DM3975 SUPERSEDED SURVEY CONTROL
DM3975
DM3975 NAD 83(2011)- 32 26 50.68920(N) 087 00 42.37672(W) AD(2010.00) c
DM3975 ELLIP H (08/??/11) 31.121 (m) GP(2010.00) c c
DM3975 NAD 83(CORS)- 32 26 50.68971(N) 087 00 42.37767(W) AD(2002.00) c
DM3975 ELLIP H (10/??/10) 31.109 (m) GP(2002.00) c c
DM3975
DM3975.Superseded values are not recommended for survey control.
DM3975
DM3975.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DM3975.See file dsdata.pdf to determine how the superseded data were derived.
DM3975
DM3975_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DM3975
DM3975 STATION DESCRIPTION
DM3975
DM3975'DESCRIBED BY NATIONAL GEODETIC SURVEY 2019
DM3975'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DM3975'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DM3975'ACCESSIBLE AT THE WORLDWIDE WEB.
DM3975'https://geodesy.noaa.gov/CORS/data.shtml
DM3975'https://geodesy.noaa.gov/CORS
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