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 09:08:15 EST
AF9520 ***********************************************************************
AF9520 CORS - This is a GPS Continuously Operating Reference Station.
AF9520 DESIGNATION - WESTFORD CORS ARP
AF9520 CORS_ID - WES2
AF9520 PID - AF9520
AF9520 STATE/COUNTY- MA/MIDDLESEX
AF9520 COUNTRY - US
AF9520 USGS QUAD - WESTFORD (2018)
AF9520
AF9520 *CURRENT SURVEY CONTROL
AF9520 ______________________________________________________________________
AF9520* NAD 83(2011) POSITION- 42 36 47.97477(N) 071 29 35.96809(W) ADJUSTED
AF9520* NAD 83(2011) ELLIP HT- 86.216 (meters) (04/??/22) ADJUSTED
AF9520* NAD 83(2011) EPOCH - 2010.00
AF9520 ______________________________________________________________________
AF9520 GEOID HEIGHT - -27.827 (meters) GEOID18
AF9520 NAD 83(2011) X - 1,492,233.943 (meters) COMP
AF9520 NAD 83(2011) Y - -4,458,090.928 (meters) COMP
AF9520 NAD 83(2011) Z - 4,296,046.088 (meters) COMP
AF9520
AF9520 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
AF9520 Standards:
AF9520 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
AF9520 Horiz Ellip SD_N SD_E SD_h (unitless)
AF9520 -------------------------------------------------------------------
AF9520 NETWORK 0.05 0.14 0.02 0.02 0.07 0.05666400
AF9520 -------------------------------------------------------------------
AF9520
AF9520.The coordinates were established by GPS observations
AF9520.and adjusted by the National Geodetic Survey in April 2022.
AF9520
AF9520.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
AF9520.been affixed to the stable North American Tectonic Plate.
AF9520
AF9520.The coordinates are valid at the epoch date displayed above
AF9520.which is a decimal equivalence of Year/Month/Day.
AF9520
AF9520.Due to the release of the International GNSS Service (IGS) 2014
AF9520.realization of the International Terrestrial Reference Frame of 2014
AF9520.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
AF9520.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
AF9520.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
AF9520.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
AF9520.currently published epoch of 2010.00.
AF9520
AF9520.Additional information on MYCS2 is available at
AF9520.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
AF9520
AF9520.Significant digits in the geoid height do not necessarily reflect accuracy.
AF9520.GEOID18 height accuracy estimate available here.
AF9520
AF9520.The PID for the CORS L1 Phase Center is DR4961.
AF9520
AF9520.Click photographs - Photos may exist for this station.
AF9520
AF9520.The XYZ, and position/ellipsoidal ht. are equivalent.
AF9520
AF9520.The ellipsoidal height was determined by GPS observations
AF9520.and is referenced to NAD 83.
AF9520
AF9520. The following values were computed from the NAD 83(2011) position.
AF9520
AF9520; North East Units Scale Factor Converg.
AF9520;SPC MA M - 929,195.154 200,547.725 MT 0.99999045 +0 00 16.1
AF9520;SPC MA M - 3,048,534.43 657,963.66 sFT 0.99999045 +0 00 16.1
AF9520;UTM 19 - 4,720,890.402 295,498.045 MT 1.00011456 -1 41 19.3
AF9520
AF9520! - Elev Factor x Scale Factor = Combined Factor
AF9520!SPC MA M - 0.99998648 x 0.99999045 = 0.99997693
AF9520!UTM 19 - 0.99998648 x 1.00011456 = 1.00010104
AF9520
AF9520_U.S. NATIONAL GRID SPATIAL ADDRESS: 19TBH9549820890(NAD 83)
AF9520
AF9520 SUPERSEDED SURVEY CONTROL
AF9520
AF9520 NAD 83(2011)- 42 36 47.97475(N) 071 29 35.96746(W) AD(2010.00) c
AF9520 ELLIP H (05/??/20) 86.216 (m) GP(2010.00) c c
AF9520 NAD 83(2011)- 42 36 47.97493(N) 071 29 35.96791(W) AD(2010.00) c
AF9520 ELLIP H (06/??/19) 86.219 (m) GP(2010.00) c c
AF9520 ELLIP H (06/27/12) 86.223 (m) GP(2010.00) 0 0
AF9520 NAD 83(2011)- 42 36 47.97481(N) 071 29 35.96790(W) AD(2010.00) c
AF9520 NAD 83(2011)- 42 36 47.97476(N) 071 29 35.96800(W) AD(2010.00) c
AF9520 ELLIP H (08/??/11) 86.219 (m) GP(2010.00) c c
AF9520 NAD 83(CORS)- 42 36 47.97506(N) 071 29 35.96894(W) AD(2002.00) c
AF9520 ELLIP H (09/??/08) 86.217 (m) GP(2002.00) c c
AF9520 ELLIP H (02/10/07) 86.228 (m) GP(2002.00)
AF9520 NAD 83(2007)- 42 36 47.97525(N) 071 29 35.96844(W) AD(2002.00) c
AF9520 NAD 83(CORS)- 42 36 47.97525(N) 071 29 35.96844(W) AD(2002.00) c
AF9520 ELLIP H (03/??/02) 86.228 (m) GP(2002.00) c c
AF9520 NAD 83(CORS)- 42 36 47.97532(N) 071 29 35.96894(W) AD(1997.00) c
AF9520 ELLIP H (07/??/96) 86.232 (m) GP(1997.00) c c
AF9520 NAD 83(CORS)- 42 36 47.97538(N) 071 29 35.96899(W) AD(1996.00) c
AF9520 ELLIP H (07/??/96) 86.234 (m) GP(1996.00) c c
AF9520 NAD 83(CORS)- 42 36 47.97532(N) 071 29 35.96894(W) AD(1997.00) c
AF9520 ELLIP H (07/??/95) 86.232 (m) GP(1997.00) c c
AF9520
AF9520.Superseded values are not recommended for survey control.
AF9520
AF9520.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
AF9520.See file dsdata.pdf to determine how the superseded data were derived.
AF9520
AF9520_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
AF9520
AF9520 STATION DESCRIPTION
AF9520
AF9520'DESCRIBED BY NATIONAL GEODETIC SURVEY 2022
AF9520'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
AF9520'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
AF9520'ACCESSIBLE AT THE WORLDWIDE WEB.
AF9520'https://geodesy.noaa.gov/CORS/data.shtml
AF9520'https://geodesy.noaa.gov/CORS
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