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 17, 2025 17:54:52 EST
DM3491 ***********************************************************************
DM3491 HT_MOD - This is a Height Modernization Survey Station.
DM3491 CORS - This is a GPS Continuously Operating Reference Station.
DM3491 DESIGNATION - CENTRE HIGH SCH CORS ARP
DM3491 CORS_ID - ALCN
DM3491 PID - DM3491
DM3491 STATE/COUNTY- AL/CHEROKEE
DM3491 COUNTRY - US
DM3491 USGS QUAD - CENTRE (2018)
DM3491
DM3491 *CURRENT SURVEY CONTROL
DM3491 ______________________________________________________________________
DM3491* NAD 83(2011) POSITION- 34 09 46.95652(N) 085 39 31.02018(W) ADJUSTED
DM3491* NAD 83(2011) ELLIP HT- 166.257 (meters) (06/??/19) ADJUSTED
DM3491* NAD 83(2011) EPOCH - 2010.00
DM3491* NAVD 88 ORTHO HEIGHT - 195.21 (meters) 640.5 (feet) GPS OBS
DM3491 ______________________________________________________________________
DM3491 GEOID HEIGHT - -28.955 (meters) GEOID18
DM3491 NAD 83(2011) X - 399,937.330 (meters) COMP
DM3491 NAD 83(2011) Y - -5,268,102.184 (meters) COMP
DM3491 NAD 83(2011) Z - 3,561,519.001 (meters) COMP
DM3491
DM3491 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
DM3491 Standards:
DM3491 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
DM3491 Horiz Ellip SD_N SD_E SD_h (unitless)
DM3491 -------------------------------------------------------------------
DM3491 NETWORK 0.15 0.41 0.06 0.07 0.21 -0.12646400
DM3491 -------------------------------------------------------------------
DM3491
DM3491.The coordinates were established by GPS observations
DM3491.and adjusted by the National Geodetic Survey in June 2019.
DM3491
DM3491.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DM3491.been affixed to the stable North American Tectonic Plate.
DM3491
DM3491.The coordinates are valid at the epoch date displayed above
DM3491.which is a decimal equivalence of Year/Month/Day.
DM3491
DM3491.Due to the release of the International GNSS Service (IGS) 2014
DM3491.realization of the International Terrestrial Reference Frame of 2014
DM3491.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DM3491.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DM3491.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DM3491.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DM3491.currently published epoch of 2010.00.
DM3491
DM3491.Additional information on MYCS2 is available at
DM3491.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DM3491
DM3491.The orthometric height was determined by GPS observations and a
DM3491.high-resolution geoid model using precise GPS observation and
DM3491.processing techniques.
DM3491
DM3491.Significant digits in the geoid height do not necessarily reflect accuracy.
DM3491.GEOID18 height accuracy estimate available here.
DM3491
DM3491.The PID for the CORS L1 Phase Center is DM3492.
DM3491
DM3491.Click photographs - Photos may exist for this station.
DM3491
DM3491.The XYZ, and position/ellipsoidal ht. are equivalent.
DM3491
DM3491.The ellipsoidal height was determined by GPS observations
DM3491.and is referenced to NAD 83.
DM3491
DM3491. The following values were computed from the NAD 83(2011) position.
DM3491
DM3491; North East Units Scale Factor Converg.
DM3491;SPC AL E - 406,202.666 216,109.618 MT 0.99996320 +0 05 53.2
DM3491;UTM 16 - 3,781,046.982 623,640.874 MT 0.99978844 +0 45 12.1
DM3491
DM3491! - Elev Factor x Scale Factor = Combined Factor
DM3491!SPC AL E - 0.99997390 x 0.99996320 = 0.99993710
DM3491!UTM 16 - 0.99997390 x 0.99978844 = 0.99976235
DM3491
DM3491_U.S. NATIONAL GRID SPATIAL ADDRESS: 16SFC2364081046(NAD 83)
DM3491
DM3491 SUPERSEDED SURVEY CONTROL
DM3491
DM3491 NAD 83(2011)- 34 09 46.95648(N) 085 39 31.02019(W) AD(2010.00) c
DM3491 ELLIP H (08/??/11) 166.254 (m) GP(2010.00) c c
DM3491 NAD 83(CORS)- 34 09 46.95692(N) 085 39 31.02100(W) AD(2002.00) c
DM3491 ELLIP H (09/??/10) 166.232 (m) GP(2002.00) c c
DM3491
DM3491.Superseded values are not recommended for survey control.
DM3491
DM3491.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DM3491.See file dsdata.pdf to determine how the superseded data were derived.
DM3491
DM3491_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DM3491
DM3491 STATION DESCRIPTION
DM3491
DM3491'DESCRIBED BY NATIONAL GEODETIC SURVEY 2019
DM3491'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DM3491'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DM3491'ACCESSIBLE AT THE WORLDWIDE WEB.
DM3491'https://geodesy.noaa.gov/CORS/data.shtml
DM3491'https://geodesy.noaa.gov/CORS
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