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 20:48:54 EST
DL8631 ***********************************************************************
DL8631 HT_MOD - This is a Height Modernization Survey Station.
DL8631 CORS - This is a GPS Continuously Operating Reference Station.
DL8631 DESIGNATION - AWES 147 BC ALWES CORS ARP
DL8631 CORS_ID - AWES
DL8631 PID - DL8631
DL8631 STATE/COUNTY- LA/ASCENSION
DL8631 COUNTRY - US
DL8631 USGS QUAD - DONALDSONVILLE (2018)
DL8631
DL8631 *CURRENT SURVEY CONTROL
DL8631 ______________________________________________________________________
DL8631* NAD 83(2011) POSITION- 30 06 00.96246(N) 090 58 58.63447(W) ADJUSTED
DL8631* NAD 83(2011) ELLIP HT- -8.962 (meters) (06/??/19) ADJUSTED
DL8631* NAD 83(2011) EPOCH - 2010.00
DL8631* NAVD 88 ORTHO HEIGHT - 17.71 (meters) 58.1 (feet) GPS OBS
DL8631* NAVD 88 EPOCH - 2009.55
DL8631 **This station is located in a suspected subsidence area (see below).
DL8631 ______________________________________________________________________
DL8631 GEOID HEIGHT - -26.632 (meters) GEOID18
DL8631 NAD 83(2011) X - -94,741.309 (meters) COMP
DL8631 NAD 83(2011) Y - -5,521,870.283 (meters) COMP
DL8631 NAD 83(2011) Z - 3,179,990.215 (meters) COMP
DL8631
DL8631 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
DL8631 Standards:
DL8631 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
DL8631 Horiz Ellip SD_N SD_E SD_h (unitless)
DL8631 -------------------------------------------------------------------
DL8631 NETWORK 0.17 0.45 0.06 0.08 0.23 0.02461100
DL8631 -------------------------------------------------------------------
DL8631
DL8631.The coordinates were established by GPS observations
DL8631.and adjusted by the National Geodetic Survey in June 2019.
DL8631
DL8631.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DL8631.been affixed to the stable North American Tectonic Plate.
DL8631
DL8631.The coordinates are valid at the epoch date displayed above
DL8631.which is a decimal equivalence of Year/Month/Day.
DL8631
DL8631.Due to the release of the International GNSS Service (IGS) 2014
DL8631.realization of the International Terrestrial Reference Frame of 2014
DL8631.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DL8631.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DL8631.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DL8631.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DL8631.currently published epoch of 2010.00.
DL8631
DL8631.Additional information on MYCS2 is available at
DL8631.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DL8631
DL8631.** This station is in an area of known vertical motion. Due to the
DL8631.** variability of land subsidence, uplift, and crustal motion, NGS has,
DL8631.** determined the orthometric heights for marks in these suspect
DL8631.** subsidence areas should be considered valid only at the epoch date
DL8631.** associated with the orthometric height. These heights must always
DL8631.** be validated when used as control. All previously superseded
DL8631.** orthometric heights are now considered suspect and are available
DL8631.** in the superseded section. NGS does not recommend using suspect
DL8631.** or superseded heights as control.
DL8631
DL8631.The orthometric height was determined by GPS observations and a
DL8631.high-resolution geoid model using precise GPS observation and
DL8631.processing techniques.
DL8631
DL8631.Significant digits in the geoid height do not necessarily reflect accuracy.
DL8631.GEOID18 height accuracy estimate available here.
DL8631
DL8631.The PID for the CORS L1 Phase Center is DR1519.
DL8631
DL8631.Click photographs - Photos may exist for this station.
DL8631
DL8631.The XYZ, and position/ellipsoidal ht. are equivalent.
DL8631
DL8631.The ellipsoidal height was determined by GPS observations
DL8631.and is referenced to NAD 83.
DL8631
DL8631. The following values were computed from the NAD 83(2011) position.
DL8631
DL8631; North East Units Scale Factor Converg.
DL8631;SPC LA S - 177,432.188 1,033,770.250 MT 0.99992724 +0 10 30.7
DL8631;SPC LA S - 582,125.44 3,391,627.90 sFT 0.99992724 +0 10 30.7
DL8631;UTM 15 - 3,331,612.101 694,363.652 MT 1.00006609 +1 00 42.8
DL8631
DL8631! - Elev Factor x Scale Factor = Combined Factor
DL8631!SPC LA S - 1.00000141 x 0.99992724 = 0.99992865
DL8631!UTM 15 - 1.00000141 x 1.00006609 = 1.00006750
DL8631
DL8631_U.S. NATIONAL GRID SPATIAL ADDRESS: 15RXP9436331612(NAD 83)
DL8631
DL8631 SUPERSEDED SURVEY CONTROL
DL8631
DL8631 NAD 83(2011)- 30 06 00.96248(N) 090 58 58.63439(W) AD(2010.00) c
DL8631 ELLIP H (08/??/11) -8.952 (m) GP(2010.00) c c
DL8631 NAD 83(CORS)- 30 06 00.96263(N) 090 58 58.63523(W) AD(2002.00) c
DL8631 ELLIP H (06/??/10) -8.940 (m) GP(2002.00) c c
DL8631
DL8631.Superseded values are not recommended for survey control.
DL8631
DL8631.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DL8631.See file dsdata.pdf to determine how the superseded data were derived.
DL8631
DL8631_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DL8631
DL8631 STATION DESCRIPTION
DL8631
DL8631'DESCRIBED BY NATIONAL GEODETIC SURVEY 2019
DL8631'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DL8631'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DL8631'ACCESSIBLE AT THE WORLDWIDE WEB.
DL8631'https://geodesy.noaa.gov/CORS/data.shtml
DL8631'https://geodesy.noaa.gov/CORS
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