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 17, 2025 14:13:02 EST
DH3146 ***********************************************************************
DH3146 CORS - This is a GPS Continuously Operating Reference Station.
DH3146 DESIGNATION - LOYOLA 4 COOP CORS ARP
DH3146 CORS_ID - LOY4
DH3146 PID - DH3146
DH3146 STATE/COUNTY- VA/LOUDOUN
DH3146 COUNTRY - US
DH3146 USGS QUAD - LEESBURG (2019)
DH3146
DH3146 *CURRENT SURVEY CONTROL
DH3146 ______________________________________________________________________
DH3146* NAD 83(2011) POSITION- 39 06 46.29749(N) 077 33 49.78517(W) ADJUSTED
DH3146* NAD 83(2011) ELLIP HT- 75.262 (meters) (06/??/19) ADJUSTED
DH3146* NAD 83(2011) EPOCH - 2010.00
DH3146 ______________________________________________________________________
DH3146 GEOID HEIGHT - -32.413 (meters) GEOID18
DH3146 NAD 83(2011) X - 1,067,174.223 (meters) COMP
DH3146 NAD 83(2011) Y - -4,839,218.098 (meters) COMP
DH3146 NAD 83(2011) Z - 4,002,093.882 (meters) COMP
DH3146
DH3146 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
DH3146 Standards:
DH3146 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
DH3146 Horiz Ellip SD_N SD_E SD_h (unitless)
DH3146 -------------------------------------------------------------------
DH3146 NETWORK 0.09 0.31 0.04 0.03 0.16 -0.01228700
DH3146 -------------------------------------------------------------------
DH3146
DH3146.The coordinates were established by GPS observations
DH3146.and adjusted by the National Geodetic Survey in June 2019.
DH3146
DH3146.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DH3146.been affixed to the stable North American Tectonic Plate.
DH3146
DH3146.The coordinates are valid at the epoch date displayed above
DH3146.which is a decimal equivalence of Year/Month/Day.
DH3146
DH3146.Due to the release of the International GNSS Service (IGS) 2014
DH3146.realization of the International Terrestrial Reference Frame of 2014
DH3146.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DH3146.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DH3146.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DH3146.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DH3146.currently published epoch of 2010.00.
DH3146
DH3146.Additional information on MYCS2 is available at
DH3146.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DH3146
DH3146.Significant digits in the geoid height do not necessarily reflect accuracy.
DH3146.GEOID18 height accuracy estimate available here.
DH3146
DH3146.The PID for the CORS L1 Phase Center is DN9742.
DH3146
DH3146.Click photographs - Photos may exist for this station.
DH3146
DH3146.The XYZ, and position/ellipsoidal ht. are equivalent.
DH3146
DH3146.The ellipsoidal height was determined by GPS observations
DH3146.and is referenced to NAD 83.
DH3146
DH3146. The following values were computed from the NAD 83(2011) position.
DH3146
DH3146; North East Units Scale Factor Converg.
DH3146;SPC VA N - 2,160,943.153 3,580,965.556 MT 0.99998570 +0 35 03.4
DH3146;SPC VA N - 7,089,694.33 11,748,551.16 sFT 0.99998570 +0 35 03.4
DH3146;UTM 18 - 4,332,430.826 278,331.395 MT 1.00020507 -1 37 05.0
DH3146
DH3146! - Elev Factor x Scale Factor = Combined Factor
DH3146!SPC VA N - 0.99998819 x 0.99998570 = 0.99997389
DH3146!UTM 18 - 0.99998819 x 1.00020507 = 1.00019326
DH3146
DH3146_U.S. NATIONAL GRID SPATIAL ADDRESS: 18STJ7833132430(NAD 83)
DH3146
DH3146 SUPERSEDED SURVEY CONTROL
DH3146
DH3146 ELLIP H (06/27/12) 75.256 (m) GP(2010.00) 0 0
DH3146 NAD 83(2011)- 39 06 46.29749(N) 077 33 49.78507(W) AD(2010.00) c
DH3146 NAD 83(2011)- 39 06 46.29749(N) 077 33 49.78508(W) AD(2010.00) c
DH3146 ELLIP H (08/??/11) 75.255 (m) GP(2010.00) c c
DH3146 NAD 83(CORS)- 39 06 46.29766(N) 077 33 49.78549(W) AD(2002.00) c
DH3146 ELLIP H (05/??/05) 75.274 (m) GP(2002.00) c c
DH3146
DH3146.Superseded values are not recommended for survey control.
DH3146
DH3146.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DH3146.See file dsdata.pdf to determine how the superseded data were derived.
DH3146
DH3146_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DH3146
DH3146 STATION DESCRIPTION
DH3146
DH3146'DESCRIBED BY NATIONAL GEODETIC SURVEY 2019
DH3146'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DH3146'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DH3146'ACCESSIBLE AT THE WORLDWIDE WEB.
DH3146'https://geodesy.noaa.gov/CORS/data.shtml
DH3146'https://geodesy.noaa.gov/CORS
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