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 19, 2025 00:19:30 EST
DG6956 ***********************************************************************
DG6956 HT_MOD - This is a Height Modernization Survey Station.
DG6956 CORS - This is a GPS Continuously Operating Reference Station.
DG6956 DESIGNATION - CLUTE COOP CORS ARP
DG6956 CORS_ID - DWI1
DG6956 PID - DG6956
DG6956 STATE/COUNTY- TX/BRAZORIA
DG6956 COUNTRY - US
DG6956 USGS QUAD - LAKE JACKSON (2019)
DG6956
DG6956 *CURRENT SURVEY CONTROL
DG6956 ______________________________________________________________________
DG6956* NAD 83(2011) POSITION- 29 00 48.95981(N) 095 24 13.15308(W) ADJUSTED
DG6956* NAD 83(2011) ELLIP HT- -18.717 (meters) (03/??/22) ADJUSTED
DG6956* NAD 83(2011) EPOCH - 2010.00
DG6956* NAVD 88 ORTHO HEIGHT - 7.81 (meters) 25.6 (feet) GPS OBS
DG6956 **This station is in an area of suspected vertical motion (see below).
DG6956 ______________________________________________________________________
DG6956 NAVD 88 orthometric height was determined with an earlier geoid model
DG6956 GEOID HEIGHT - -26.522 (meters) GEOID18
DG6956 NAD 83(2011) X - -525,675.536 (meters) COMP
DG6956 NAD 83(2011) Y - -5,557,283.866 (meters) COMP
DG6956 NAD 83(2011) Z - 3,075,210.404 (meters) COMP
DG6956
DG6956 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
DG6956 Standards:
DG6956 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
DG6956 Horiz Ellip SD_N SD_E SD_h (unitless)
DG6956 -------------------------------------------------------------------
DG6956 NETWORK 0.15 0.43 0.05 0.07 0.22 0.08269500
DG6956 -------------------------------------------------------------------
DG6956
DG6956.The coordinates were established by GPS observations
DG6956.and adjusted by the National Geodetic Survey in March 2022.
DG6956
DG6956.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DG6956.been affixed to the stable North American Tectonic Plate.
DG6956
DG6956.The coordinates are valid at the epoch date displayed above
DG6956.which is a decimal equivalence of Year/Month/Day.
DG6956
DG6956.Due to the release of the International GNSS Service (IGS) 2014
DG6956.realization of the International Terrestrial Reference Frame of 2014
DG6956.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DG6956.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DG6956.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DG6956.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DG6956.currently published epoch of 2010.00.
DG6956
DG6956.Additional information on MYCS2 is available at
DG6956.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DG6956
DG6956.** This station is in an area of suspected land subsidence, uplift, or
DG6956.** crustal motion. NGS recommends this and all published orthometric
DG6956.** heights in such areas be validated before use as vertical control.
DG6956.** Click here to see a list and map of nearby stations with valid
DG6956.** orthometric heights. Note: While datasheets are updated in real-time,
DG6956.** updates to archived datasheets and the SE TX Valid OH map occur
DG6956.** monthly. NGS discourages the use of scaled, VERTCON, or superseded
DG6956.** heights as vertical control as they are deemed unreliable.
DG6956.**
DG6956.** If an established orthometric height is unavailable in the survey control
DG6956.** section, it should be considered suspect. To view suspect heights,
DG6956.** (in the superseded section), select 'Include suspect heights in vertical
DG6956.** motion areas' box from the datasheet retrieval page.
DG6956
DG6956.The orthometric height was determined by GPS observations and a
DG6956.high-resolution geoid model using precise GPS observation and
DG6956.processing techniques.
DG6956
DG6956.Significant digits in the geoid height do not necessarily reflect accuracy.
DG6956.GEOID18 height accuracy estimate available here.
DG6956
DG6956.The PID for the CORS L1 Phase Center is DQ5192.
DG6956
DG6956.Click photographs - Photos may exist for this station.
DG6956
DG6956.The XYZ, and position/ellipsoidal ht. are equivalent.
DG6956
DG6956.The ellipsoidal height was determined by GPS observations
DG6956.and is referenced to NAD 83.
DG6956
DG6956. The following values were computed from the NAD 83(2011) position.
DG6956
DG6956; North East Units Scale Factor Converg.
DG6956;SPC TXSC - 4,136,191.570 950,280.529 MT 0.99987886 +1 45 42.8
DG6956;SPC TXSC -13,570,155.18 3,117,712.04 sFT 0.99987886 +1 45 42.8
DG6956;UTM 15 - 3,211,875.139 265,878.323 MT 1.00027645 -1 09 58.8
DG6956
DG6956! - Elev Factor x Scale Factor = Combined Factor
DG6956!SPC TXSC - 1.00000294 x 0.99987886 = 0.99988180
DG6956!UTM 15 - 1.00000294 x 1.00027645 = 1.00027939
DG6956
DG6956_U.S. NATIONAL GRID SPATIAL ADDRESS: 15RTN6587811875(NAD 83)
DG6956
DG6956 SUPERSEDED SURVEY CONTROL
DG6956
DG6956 NAD 83(2011)- 29 00 48.95976(N) 095 24 13.15310(W) AD(2010.00) c
DG6956 ELLIP H (05/??/21) -18.727 (m) GP(2010.00) c c
DG6956 NAD 83(2011)- 29 00 48.95960(N) 095 24 13.15308(W) AD(2010.00) c
DG6956 ELLIP H (06/??/19) -18.713 (m) GP(2010.00) c c
DG6956 ELLIP H (06/27/12) -18.727 (m) GP(2010.00) 0 0
DG6956 NAD 83(2011)- 29 00 48.96004(N) 095 24 13.15275(W) AD(2010.00) c
DG6956 NAD 83(2011)- 29 00 48.95975(N) 095 24 13.15313(W) AD(2010.00) c
DG6956 ELLIP H (08/??/11) -18.709 (m) GP(2010.00) c c
DG6956 NAD 83(CORS)- 29 00 48.96021(N) 095 24 13.15373(W) AD(2002.00) c
DG6956 ELLIP H (07/??/04) -18.704 (m) GP(2002.00) c c
DG6956 NAVD 88 (06/07/10) 7.77 (m) GEOID09 model used GPS OBS
DG6956
DG6956.Superseded values are not recommended for survey control.
DG6956
DG6956.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DG6956.See file dsdata.pdf to determine how the superseded data were derived.
DG6956
DG6956_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DG6956
DG6956 STATION DESCRIPTION
DG6956
DG6956'DESCRIBED BY NATIONAL GEODETIC SURVEY 2022
DG6956'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DG6956'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DG6956'ACCESSIBLE AT THE WORLDWIDE WEB.
DG6956'https://geodesy.noaa.gov/CORS/data.shtml
DG6956'https://geodesy.noaa.gov/CORS
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