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 20:20:02 EST
DL7331 ***********************************************************************
DL7331 CORS - This is a GPS Continuously Operating Reference Station.
DL7331 DESIGNATION - FOLEY CORS ARP
DL7331 CORS_ID - ALFO
DL7331 PID - DL7331
DL7331 STATE/COUNTY- AL/BALDWIN
DL7331 COUNTRY - US
DL7331 USGS QUAD - FOLEY (2018)
DL7331
DL7331 *CURRENT SURVEY CONTROL
DL7331 ______________________________________________________________________
DL7331* NAD 83(2011) POSITION- 30 25 01.02230(N) 087 40 30.26064(W) ADJUSTED
DL7331* NAD 83(2011) ELLIP HT- 4.443 (meters) (06/??/19) ADJUSTED
DL7331* NAD 83(2011) EPOCH - 2010.00
DL7331* NAVD 88 ORTHO HEIGHT - 32.259 (meters) 105.84 (feet) ADJUSTED
DL7331* NAVD 88 EPOCH - 2009.55
DL7331 **This station is located in a suspected subsidence area (see below).
DL7331 ______________________________________________________________________
DL7331 GEOID HEIGHT - -27.840 (meters) GEOID18
DL7331 NAD 83(2011) X - 223,318.795 (meters) COMP
DL7331 NAD 83(2011) Y - -5,500,472.795 (meters) COMP
DL7331 NAD 83(2011) Z - 3,210,320.504 (meters) COMP
DL7331 VERT ORDER - FIRST CLASS II
DL7331
DL7331 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
DL7331 Standards:
DL7331 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
DL7331 Horiz Ellip SD_N SD_E SD_h (unitless)
DL7331 -------------------------------------------------------------------
DL7331 NETWORK 0.15 0.37 0.06 0.07 0.19 0.04832600
DL7331 -------------------------------------------------------------------
DL7331
DL7331.The coordinates were established by GPS observations
DL7331.and adjusted by the National Geodetic Survey in June 2019.
DL7331
DL7331.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DL7331.been affixed to the stable North American Tectonic Plate.
DL7331
DL7331.The coordinates are valid at the epoch date displayed above
DL7331.which is a decimal equivalence of Year/Month/Day.
DL7331
DL7331.Due to the release of the International GNSS Service (IGS) 2014
DL7331.realization of the International Terrestrial Reference Frame of 2014
DL7331.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DL7331.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DL7331.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DL7331.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DL7331.currently published epoch of 2010.00.
DL7331
DL7331.Additional information on MYCS2 is available at
DL7331.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DL7331
DL7331.** This station is in an area of known vertical motion. Due to the
DL7331.** variability of land subsidence, uplift, and crustal motion, NGS has,
DL7331.** determined the orthometric heights for marks in these suspect
DL7331.** subsidence areas should be considered valid only at the epoch date
DL7331.** associated with the orthometric height. These heights must always
DL7331.** be validated when used as control. All previously superseded
DL7331.** orthometric heights are now considered suspect and are available
DL7331.** in the superseded section. NGS does not recommend using suspect
DL7331.** or superseded heights as control.
DL7331
DL7331.The orthometric height was determined by differential leveling and
DL7331.adjusted by the NATIONAL GEODETIC SURVEY
DL7331.in July 2012.
DL7331
DL7331.No vertical observational check was made to the station.
DL7331
DL7331.Significant digits in the geoid height do not necessarily reflect accuracy.
DL7331.GEOID18 height accuracy estimate available here.
DL7331
DL7331.The PID for the CORS L1 Phase Center is DP8529.
DL7331
DL7331.Click photographs - Photos may exist for this station.
DL7331
DL7331.The XYZ, and position/ellipsoidal ht. are equivalent.
DL7331
DL7331.The ellipsoidal height was determined by GPS observations
DL7331.and is referenced to NAD 83.
DL7331
DL7331. The following values were computed from the NAD 83(2011) position.
DL7331
DL7331; North East Units Scale Factor Converg.
DL7331;SPC AL W - 46,231.395 583,180.085 MT 0.99993682 -0 05 19.1
DL7331;UTM 16 - 3,365,181.716 435,163.993 MT 0.99965186 -0 20 30.5
DL7331
DL7331! - Elev Factor x Scale Factor = Combined Factor
DL7331!SPC AL W - 0.99999930 x 0.99993682 = 0.99993612
DL7331!UTM 16 - 0.99999930 x 0.99965186 = 0.99965116
DL7331
DL7331_U.S. NATIONAL GRID SPATIAL ADDRESS: 16RDU3516365181(NAD 83)
DL7331
DL7331 SUPERSEDED SURVEY CONTROL
DL7331
DL7331 NAD 83(2011)- 30 25 01.02190(N) 087 40 30.26070(W) AD(2010.00) c
DL7331 ELLIP H (08/??/11) 4.461 (m) GP(2010.00) c c
DL7331 NAD 83(CORS)- 30 25 01.02245(N) 087 40 30.26169(W) AD(2002.00) c
DL7331 ELLIP H (04/??/10) 4.448 (m) GP(2002.00) c c
DL7331
DL7331.Superseded values are not recommended for survey control.
DL7331
DL7331.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DL7331.See file dsdata.pdf to determine how the superseded data were derived.
DL7331
DL7331_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DL7331
DL7331 STATION DESCRIPTION
DL7331
DL7331'DESCRIBED BY NATIONAL GEODETIC SURVEY 2019
DL7331'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DL7331'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DL7331'ACCESSIBLE AT THE WORLDWIDE WEB.
DL7331'https://geodesy.noaa.gov/CORS/data.shtml
DL7331'https://geodesy.noaa.gov/CORS
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