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 00:07:35 EST
AF9489 ***********************************************************************
AF9489 HT_MOD - This is a Height Modernization Survey Station.
AF9489 CORS - This is a GPS Continuously Operating Reference Station.
AF9489 DESIGNATION - GALVESTON 1 CORS ARP
AF9489 CORS_ID - GAL1
AF9489 PID - AF9489
AF9489 STATE/COUNTY- TX/GALVESTON
AF9489 COUNTRY - US
AF9489 USGS QUAD - THE JETTIES (2019)
AF9489
AF9489 *CURRENT SURVEY CONTROL
AF9489 ______________________________________________________________________
AF9489* NAD 83(2011) POSITION- 29 19 47.55228(N) 094 44 12.48454(W) ADJUSTED
AF9489* NAD 83(2011) ELLIP HT- -16.257 (meters) (06/??/19) ADJUSTED
AF9489* NAD 83(2011) EPOCH - 2010.00
AF9489* NAVD 88 ORTHO HEIGHT - **(meters) **(feet) NOT PUB
AF9489 **This station is in an area of suspected vertical motion (see below).
AF9489 ______________________________________________________________________
AF9489 NAVD 88 orthometric height was determined with an earlier geoid model
AF9489 GEOID HEIGHT - -26.616 (meters) GEOID18
AF9489 NAD 83(2011) X - -459,550.601 (meters) COMP
AF9489 NAD 83(2011) Y - -5,545,999.025 (meters) COMP
AF9489 NAD 83(2011) Z - 3,105,820.681 (meters) COMP
AF9489
AF9489 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
AF9489 Standards:
AF9489 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
AF9489 Horiz Ellip SD_N SD_E SD_h (unitless)
AF9489 -------------------------------------------------------------------
AF9489 NETWORK 0.22 0.56 0.08 0.10 0.29 0.00477800
AF9489 -------------------------------------------------------------------
AF9489
AF9489.The coordinates were established by GPS observations
AF9489.and adjusted by the National Geodetic Survey in June 2019.
AF9489
AF9489.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
AF9489.been affixed to the stable North American Tectonic Plate.
AF9489
AF9489.The coordinates are valid at the epoch date displayed above
AF9489.which is a decimal equivalence of Year/Month/Day.
AF9489
AF9489.Due to the release of the International GNSS Service (IGS) 2014
AF9489.realization of the International Terrestrial Reference Frame of 2014
AF9489.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
AF9489.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
AF9489.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
AF9489.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
AF9489.currently published epoch of 2010.00.
AF9489
AF9489.Additional information on MYCS2 is available at
AF9489.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
AF9489
AF9489.** This station is in an area of suspected land subsidence, uplift, or
AF9489.** crustal motion. NGS recommends this and all published orthometric
AF9489.** heights in such areas be validated before use as vertical control.
AF9489.** Click here to see a list and map of nearby stations with valid
AF9489.** orthometric heights. Note: While datasheets are updated in real-time,
AF9489.** updates to archived datasheets and the SE TX Valid OH map occur
AF9489.** monthly. NGS discourages the use of scaled, VERTCON, or superseded
AF9489.** heights as vertical control as they are deemed unreliable.
AF9489.**
AF9489.** If an established orthometric height is unavailable in the survey control
AF9489.** section, it should be considered suspect. To view suspect heights,
AF9489.** (in the superseded section), select 'Include suspect heights in vertical
AF9489.** motion areas' box from the datasheet retrieval page.
AF9489
AF9489.Significant digits in the geoid height do not necessarily reflect accuracy.
AF9489.GEOID18 height accuracy estimate available here.
AF9489
AF9489.The PID for the CORS L1 Phase Center is AJ7860.
AF9489
AF9489.Click photographs - Photos may exist for this station.
AF9489
AF9489.The XYZ, and position/ellipsoidal ht. are equivalent.
AF9489
AF9489.The ellipsoidal height was determined by GPS observations
AF9489.and is referenced to NAD 83.
AF9489
AF9489. The following values were computed from the NAD 83(2011) position.
AF9489
AF9489; North East Units Scale Factor Converg.
AF9489;SPC TXSC - 4,173,401.629 1,013,927.336 MT 0.99986325 +2 05 18.9
AF9489;SPC TXSC -13,692,235.18 3,326,526.60 sFT 0.99986325 +2 05 18.9
AF9489;UTM 15 - 3,245,786.154 331,362.042 MT 0.99995092 -0 51 03.4
AF9489
AF9489! - Elev Factor x Scale Factor = Combined Factor
AF9489!SPC TXSC - 1.00000255 x 0.99986325 = 0.99986580
AF9489!UTM 15 - 1.00000255 x 0.99995092 = 0.99995347
AF9489
AF9489_U.S. NATIONAL GRID SPATIAL ADDRESS: 15RUN3136245786(NAD 83)
AF9489
AF9489 SUPERSEDED SURVEY CONTROL
AF9489
AF9489 ELLIP H (06/27/12) -16.231 (m) GP(2010.00) 0 0
AF9489 NAD 83(2011)- 29 19 47.55253(N) 094 44 12.48480(W) AD(2010.00) c
AF9489 NAD 83(2011)- 29 19 47.55224(N) 094 44 12.48444(W) AD(2010.00) c
AF9489 ELLIP H (08/??/11) -16.259 (m) GP(2010.00) c c
AF9489 ELLIP H (02/10/07) -16.217 (m) GP(2002.00)
AF9489 NAD 83(2007)- 29 19 47.55228(N) 094 44 12.48554(W) AD(2002.00) c
AF9489 NAD 83(CORS)- 29 19 47.55228(N) 094 44 12.48554(W) AD(2002.00) c
AF9489 ELLIP H (03/??/02) -16.217 (m) GP(2002.00) c c
AF9489 NAD 83(CORS)- 29 19 47.55244(N) 094 44 12.48563(W) AD(1997.00) c
AF9489 ELLIP H (04/??/00) -16.183 (m) GP(1997.00) c c
AF9489 NAD 83(CORS)- 29 19 47.55231(N) 094 44 12.48541(W) AD(1997.00) c
AF9489 ELLIP H (04/??/96) -16.178 (m) GP(1997.00) c c
AF9489 NAD 83(CORS)- 29 19 47.55231(N) 094 44 12.48541(W) AD(1996.00) c
AF9489 ELLIP H (04/??/96) -16.178 (m) GP(1996.00) c c
AF9489
AF9489.Superseded values are not recommended for survey control.
AF9489
AF9489.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
AF9489.See file dsdata.pdf to determine how the superseded data were derived.
AF9489
AF9489_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
AF9489
AF9489 STATION DESCRIPTION
AF9489
AF9489'DESCRIBED BY NATIONAL GEODETIC SURVEY 2019
AF9489'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
AF9489'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
AF9489'ACCESSIBLE AT THE WORLDWIDE WEB.
AF9489'https://geodesy.noaa.gov/CORS/data.shtml
AF9489'https://geodesy.noaa.gov/CORS
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