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 18, 2025 19:09:14 EST
DP4178 ***********************************************************************
DP4178 CORS - This is a GPS Continuously Operating Reference Station.
DP4178 DESIGNATION - TROY UNIVERSITY CORS ARP
DP4178 CORS_ID - ALTU
DP4178 PID - DP4178
DP4178 STATE/COUNTY- AL/PIKE
DP4178 COUNTRY - US
DP4178 USGS QUAD - TROY (2018)
DP4178
DP4178 *CURRENT SURVEY CONTROL
DP4178 ______________________________________________________________________
DP4178* NAD 83(2011) POSITION- 31 48 00.71537(N) 085 57 15.51032(W) ADJUSTED
DP4178* NAD 83(2011) ELLIP HT- 142.518 (meters) (06/??/19) ADJUSTED
DP4178* NAD 83(2011) EPOCH - 2010.00
DP4178 ______________________________________________________________________
DP4178 GEOID HEIGHT - -26.515 (meters) GEOID18
DP4178 NAD 83(2011) X - 382,807.051 (meters) COMP
DP4178 NAD 83(2011) Y - -5,412,366.168 (meters) COMP
DP4178 NAD 83(2011) Z - 3,341,697.616 (meters) COMP
DP4178
DP4178.Formal positional accuracy estimates are not available for this CORS
DP4178.because its coordinates were determined in part using modeled
DP4178.velocities. Approximate one-sigma accuracies for latitude, longitude,
DP4178.and ellipsoid height can be obtained from the short-term time series.
DP4178.Additional information regarding modeled velocities is available on
DP4178.the CORS Coordinates for MYCS2 web page:
DP4178.https://www.ngs.noaa.gov/CORS/news/mycs2/mycs2.shtml.
DP4178
DP4178.The coordinates were established by GPS observations
DP4178.and adjusted by the National Geodetic Survey in June 2019.
DP4178
DP4178.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DP4178.been affixed to the stable North American Tectonic Plate.
DP4178
DP4178.The coordinates are valid at the epoch date displayed above
DP4178.which is a decimal equivalence of Year/Month/Day.
DP4178
DP4178.Due to the release of the International GNSS Service (IGS) 2014
DP4178.realization of the International Terrestrial Reference Frame of 2014
DP4178.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DP4178.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DP4178.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DP4178.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DP4178.currently published epoch of 2010.00.
DP4178
DP4178.Additional information on MYCS2 is available at
DP4178.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DP4178
DP4178.Significant digits in the geoid height do not necessarily reflect accuracy.
DP4178.GEOID18 height accuracy estimate available here.
DP4178
DP4178.The PID for the CORS L1 Phase Center is DP4179.
DP4178
DP4178.Click photographs - Photos may exist for this station.
DP4178
DP4178.The XYZ, and position/ellipsoidal ht. are equivalent.
DP4178
DP4178.The ellipsoidal height was determined by GPS observations
DP4178.and is referenced to NAD 83.
DP4178
DP4178. The following values were computed from the NAD 83(2011) position.
DP4178
DP4178; North East Units Scale Factor Converg.
DP4178;SPC AL E - 144,156.330 188,544.419 MT 0.99996162 -0 03 49.5
DP4178;UTM 16 - 3,518,765.609 598,987.207 MT 0.99972084 +0 33 03.9
DP4178
DP4178! - Elev Factor x Scale Factor = Combined Factor
DP4178!SPC AL E - 0.99997762 x 0.99996162 = 0.99993924
DP4178!UTM 16 - 0.99997762 x 0.99972084 = 0.99969847
DP4178
DP4178_U.S. NATIONAL GRID SPATIAL ADDRESS: 16REA9898718765(NAD 83)
DP4178
DP4178 SUPERSEDED SURVEY CONTROL
DP4178
DP4178 NAD 83(2011)- 31 48 00.71565(N) 085 57 15.51042(W) AD(2010.00) c
DP4178 ELLIP H (07/??/14) 142.530 (m) GP(2010.00) c c
DP4178
DP4178.Superseded values are not recommended for survey control.
DP4178
DP4178.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DP4178.See file dsdata.pdf to determine how the superseded data were derived.
DP4178
DP4178_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DP4178
DP4178 STATION DESCRIPTION
DP4178
DP4178'DESCRIBED BY NATIONAL GEODETIC SURVEY 2019
DP4178'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DP4178'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DP4178'ACCESSIBLE AT THE WORLDWIDE WEB.
DP4178'https://geodesy.noaa.gov/CORS/data.shtml
DP4178'https://geodesy.noaa.gov/CORS
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