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 16:15:47 EST
AF9521 ***********************************************************************
AF9521 CORS - This is a GPS Continuously Operating Reference Station.
AF9521 DESIGNATION - LAKE HOUSTON CORS ARP
AF9521 CORS_ID - LKHU
AF9521 PID - AF9521
AF9521 STATE/COUNTY- TX/HARRIS
AF9521 COUNTRY - US
AF9521 USGS QUAD - HARMASTON (2019)
AF9521
AF9521 *CURRENT SURVEY CONTROL
AF9521 ______________________________________________________________________
AF9521* NAD 83(2011) POSITION- 29 54 48.44075(N) 095 08 44.68823(W) ADJUSTED
AF9521* NAD 83(2011) ELLIP HT- -7.202 (meters) (06/??/19) ADJUSTED
AF9521* NAD 83(2011) EPOCH - 2010.00
AF9521* NAVD 88 ORTHO HEIGHT - 20.152 (meters) 66.12 (feet) ADJUSTED
AF9521 **This station is in an area of suspected vertical motion (see below).
AF9521 ______________________________________________________________________
AF9521 GEOID HEIGHT - -27.350 (meters) GEOID18
AF9521 NAD 83(2011) X - -496,255.886 (meters) COMP
AF9521 NAD 83(2011) Y - -5,510,741.492 (meters) COMP
AF9521 NAD 83(2011) Z - 3,162,058.243 (meters) COMP
AF9521 VERT ORDER - SECOND CLASS I
AF9521
AF9521 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
AF9521 Standards:
AF9521 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
AF9521 Horiz Ellip SD_N SD_E SD_h (unitless)
AF9521 -------------------------------------------------------------------
AF9521 NETWORK 0.22 0.48 0.08 0.10 0.24 0.12803300
AF9521 -------------------------------------------------------------------
AF9521
AF9521.The coordinates were established by GPS observations
AF9521.and adjusted by the National Geodetic Survey in June 2019.
AF9521
AF9521.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
AF9521.been affixed to the stable North American Tectonic Plate.
AF9521
AF9521.The coordinates are valid at the epoch date displayed above
AF9521.which is a decimal equivalence of Year/Month/Day.
AF9521
AF9521.Due to the release of the International GNSS Service (IGS) 2014
AF9521.realization of the International Terrestrial Reference Frame of 2014
AF9521.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
AF9521.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
AF9521.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
AF9521.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
AF9521.currently published epoch of 2010.00.
AF9521
AF9521.Additional information on MYCS2 is available at
AF9521.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
AF9521
AF9521.** This station is in an area of suspected land subsidence, uplift, or
AF9521.** crustal motion. NGS recommends this and all published orthometric
AF9521.** heights in such areas be validated before use as vertical control.
AF9521.** Click here to see a list and map of nearby stations with valid
AF9521.** orthometric heights. Note: While datasheets are updated in real-time,
AF9521.** updates to archived datasheets and the SE TX Valid OH map occur
AF9521.** monthly. NGS discourages the use of scaled, VERTCON, or superseded
AF9521.** heights as vertical control as they are deemed unreliable.
AF9521.**
AF9521.** If an established orthometric height is unavailable in the survey control
AF9521.** section, it should be considered suspect. To view suspect heights,
AF9521.** (in the superseded section), select 'Include suspect heights in vertical
AF9521.** motion areas' box from the datasheet retrieval page.
AF9521
AF9521.The orthometric height was determined by differential leveling and
AF9521.adjusted by the NATIONAL GEODETIC SURVEY
AF9521.in January 2021.
AF9521
AF9521.Significant digits in the geoid height do not necessarily reflect accuracy.
AF9521.GEOID18 height accuracy estimate available here.
AF9521
AF9521.The PID for the CORS L1 Phase Center is DQ5169.
AF9521
AF9521.Click photographs - Photos may exist for this station.
AF9521
AF9521.The XYZ, and position/ellipsoidal ht. are equivalent.
AF9521
AF9521.The ellipsoidal height was determined by GPS observations
AF9521.and is referenced to NAD 83.
AF9521
AF9521. The following values were computed from the NAD 83(2011) position.
AF9521
AF9521; North East Units Scale Factor Converg.
AF9521;SPC TXSC - 4,236,668.329 972,105.466 MT 0.99991407 +1 53 17.7
AF9521;SPC TXSC -13,899,802.68 3,189,316.02 sFT 0.99991407 +1 53 17.7
AF9521;UTM 15 - 3,311,130.626 292,843.841 MT 1.00012949 -1 04 13.6
AF9521
AF9521! - Elev Factor x Scale Factor = Combined Factor
AF9521!SPC TXSC - 1.00000113 x 0.99991407 = 0.99991520
AF9521!UTM 15 - 1.00000113 x 1.00012949 = 1.00013062
AF9521
AF9521_U.S. NATIONAL GRID SPATIAL ADDRESS: 15RTP9284311130(NAD 83)
AF9521
AF9521 SUPERSEDED SURVEY CONTROL
AF9521
AF9521 ELLIP H (06/27/12) -7.204 (m) GP(2010.00) 0 0
AF9521 NAD 83(2011)- 29 54 48.44091(N) 095 08 44.68820(W) AD(2010.00) c
AF9521 NAD 83(2011)- 29 54 48.44082(N) 095 08 44.68825(W) AD(2010.00) c
AF9521 ELLIP H (08/??/11) -7.207 (m) GP(2010.00) c c
AF9521 ELLIP H (02/10/07) -7.178 (m) GP(2002.00)
AF9521 NAD 83(2007)- 29 54 48.44022(N) 095 08 44.68925(W) AD(2002.00) c
AF9521 NAD 83(CORS)- 29 54 48.44022(N) 095 08 44.68925(W) AD(2002.00) c
AF9521 ELLIP H (03/??/02) -7.178 (m) GP(2002.00) c c
AF9521 NAD 83(CORS)- 29 54 48.43963(N) 095 08 44.68952(W) AD(1997.00) c
AF9521 ELLIP H (04/??/96) -7.166 (m) GP(1997.00) c c
AF9521 NAD 83(CORS)- 29 54 48.43963(N) 095 08 44.68952(W) AD(1996.00) c
AF9521 ELLIP H (04/??/96) -7.166 (m) GP(1996.00) c c
AF9521 NAVD 88 (11/19/99) 20.2 (m) GEOID96 model used GPS OBS
AF9521 NAVD 88 20.15 (m) 66.1 (f) LEVELING 3
AF9521
AF9521.Superseded values are not recommended for survey control.
AF9521
AF9521.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
AF9521.See file dsdata.pdf to determine how the superseded data were derived.
AF9521
AF9521_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
AF9521
AF9521 STATION DESCRIPTION
AF9521
AF9521'DESCRIBED BY NATIONAL GEODETIC SURVEY 2019
AF9521'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
AF9521'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
AF9521'ACCESSIBLE AT THE WORLDWIDE WEB.
AF9521'https://geodesy.noaa.gov/CORS/data.shtml
AF9521'https://geodesy.noaa.gov/CORS
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