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 07:03:52 EST
DM7139 ***********************************************************************
DM7139 HT_MOD - This is a Height Modernization Survey Station.
DM7139 CORS - This is a GPS Continuously Operating Reference Station.
DM7139 DESIGNATION - ANAHUAC CORS ARP
DM7139 CORS_ID - TXAC
DM7139 PID - DM7139
DM7139 STATE/COUNTY- TX/CHAMBERS
DM7139 COUNTRY - US
DM7139 USGS QUAD - ANAHUAC (2019)
DM7139
DM7139 *CURRENT SURVEY CONTROL
DM7139 ______________________________________________________________________
DM7139* NAD 83(2011) POSITION- 29 46 40.05947(N) 094 40 17.23155(W) ADJUSTED
DM7139* NAD 83(2011) ELLIP HT- -16.901 (meters) (04/??/22) ADJUSTED
DM7139* NAD 83(2011) EPOCH - 2010.00
DM7139* NAVD 88 ORTHO HEIGHT - 10.31 (meters) 33.8 (feet) GPS OBS
DM7139 **This station is in an area of suspected vertical motion (see below).
DM7139 ______________________________________________________________________
DM7139 GEOID HEIGHT - -27.214 (meters) GEOID18
DM7139 NAD 83(2011) X - -451,230.394 (meters) COMP
DM7139 NAD 83(2011) Y - -5,522,111.280 (meters) COMP
DM7139 NAD 83(2011) Z - 3,149,009.897 (meters) COMP
DM7139
DM7139 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
DM7139 Standards:
DM7139 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
DM7139 Horiz Ellip SD_N SD_E SD_h (unitless)
DM7139 -------------------------------------------------------------------
DM7139 NETWORK 0.25 0.40 0.06 0.12 0.21 0.06169400
DM7139 -------------------------------------------------------------------
DM7139
DM7139.The coordinates were established by GPS observations
DM7139.and adjusted by the National Geodetic Survey in April 2022.
DM7139
DM7139.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DM7139.been affixed to the stable North American Tectonic Plate.
DM7139
DM7139.The coordinates are valid at the epoch date displayed above
DM7139.which is a decimal equivalence of Year/Month/Day.
DM7139
DM7139.Due to the release of the International GNSS Service (IGS) 2014
DM7139.realization of the International Terrestrial Reference Frame of 2014
DM7139.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DM7139.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DM7139.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DM7139.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DM7139.currently published epoch of 2010.00.
DM7139
DM7139.Additional information on MYCS2 is available at
DM7139.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DM7139
DM7139.** This station is in an area of suspected land subsidence, uplift, or
DM7139.** crustal motion. NGS recommends this and all published orthometric
DM7139.** heights in such areas be validated before use as vertical control.
DM7139.** Click here to see a list and map of nearby stations with valid
DM7139.** orthometric heights. Note: While datasheets are updated in real-time,
DM7139.** updates to archived datasheets and the SE TX Valid OH map occur
DM7139.** monthly. NGS discourages the use of scaled, VERTCON, or superseded
DM7139.** heights as vertical control as they are deemed unreliable.
DM7139.**
DM7139.** If an established orthometric height is unavailable in the survey control
DM7139.** section, it should be considered suspect. To view suspect heights,
DM7139.** (in the superseded section), select 'Include suspect heights in vertical
DM7139.** motion areas' box from the datasheet retrieval page.
DM7139
DM7139.The orthometric height was determined by GPS observations and a
DM7139.high-resolution geoid model using precise GPS observation and
DM7139.processing techniques.
DM7139
DM7139.Significant digits in the geoid height do not necessarily reflect accuracy.
DM7139.GEOID18 height accuracy estimate available here.
DM7139
DM7139.The PID for the CORS L1 Phase Center is DR7779.
DM7139
DM7139.Click photographs - Photos may exist for this station.
DM7139
DM7139.The XYZ, and position/ellipsoidal ht. are equivalent.
DM7139
DM7139.The ellipsoidal height was determined by GPS observations
DM7139.and is referenced to NAD 83.
DM7139
DM7139. The following values were computed from the NAD 83(2011) position.
DM7139
DM7139; North East Units Scale Factor Converg.
DM7139;SPC TXSC - 4,223,243.914 1,018,432.351 MT 0.99989302 +2 07 14.2
DM7139;SPC TXSC -13,855,759.41 3,341,306.80 sFT 0.99989302 +2 07 14.2
DM7139;UTM 15 - 3,295,334.260 338,422.577 MT 0.99992212 -0 49 49.0
DM7139
DM7139! - Elev Factor x Scale Factor = Combined Factor
DM7139!SPC TXSC - 1.00000265 x 0.99989302 = 0.99989567
DM7139!UTM 15 - 1.00000265 x 0.99992212 = 0.99992477
DM7139
DM7139_U.S. NATIONAL GRID SPATIAL ADDRESS: 15RUN3842295334(NAD 83)
DM7139
DM7139 SUPERSEDED SURVEY CONTROL
DM7139
DM7139 NAD 83(2011)- 29 46 40.05947(N) 094 40 17.23155(W) AD(2010.00) c
DM7139 ELLIP H (06/??/19) -16.920 (m) GP(2010.00) c c
DM7139 NAD 83(2011)- 29 46 40.05957(N) 094 40 17.23151(W) AD(2010.00) c
DM7139 ELLIP H (08/??/11) -16.926 (m) GP(2010.00) c c
DM7139 NAD 83(CORS)- 29 46 40.05978(N) 094 40 17.23244(W) AD(2002.00) c
DM7139 ELLIP H (04/??/11) -16.930 (m) GP(2002.00) c c
DM7139 NAVD 88 (04/24/12) 10.33 (m) GEOID09 model used GPS OBS
DM7139
DM7139.Superseded values are not recommended for survey control.
DM7139
DM7139.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DM7139.See file dsdata.pdf to determine how the superseded data were derived.
DM7139
DM7139_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DM7139
DM7139 STATION DESCRIPTION
DM7139
DM7139'DESCRIBED BY NATIONAL GEODETIC SURVEY 2022
DM7139'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DM7139'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DM7139'ACCESSIBLE AT THE WORLDWIDE WEB.
DM7139'https://geodesy.noaa.gov/CORS/data.shtml
DM7139'https://geodesy.noaa.gov/CORS
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