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 14:13:31 EST
DM3969 ***********************************************************************
DM3969 HT_MOD - This is a Height Modernization Survey Station.
DM3969 CORS - This is a GPS Continuously Operating Reference Station.
DM3969 DESIGNATION - APPALCHN ELEM SCH CORS ARP
DM3969 CORS_ID - ALHL
DM3969 PID - DM3969
DM3969 STATE/COUNTY- AL/BLOUNT
DM3969 COUNTRY - US
DM3969 USGS QUAD - ONEONTA (2018)
DM3969
DM3969 *CURRENT SURVEY CONTROL
DM3969 ______________________________________________________________________
DM3969* NAD 83(2011) POSITION- 33 53 15.27573(N) 086 23 52.59568(W) ADJUSTED
DM3969* NAD 83(2011) ELLIP HT- 332.089 (meters) (06/??/19) ADJUSTED
DM3969* NAD 83(2011) EPOCH - 2010.00
DM3969* NAVD 88 ORTHO HEIGHT - 361.25 (meters) 1185.2 (feet) GPS OBS
DM3969 ______________________________________________________________________
DM3969 GEOID HEIGHT - -29.157 (meters) GEOID18
DM3969 NAD 83(2011) X - 333,010.863 (meters) COMP
DM3969 NAD 83(2011) Y - -5,290,025.819 (meters) COMP
DM3969 NAD 83(2011) Z - 3,536,286.660 (meters) COMP
DM3969
DM3969 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
DM3969 Standards:
DM3969 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
DM3969 Horiz Ellip SD_N SD_E SD_h (unitless)
DM3969 -------------------------------------------------------------------
DM3969 NETWORK 0.14 0.24 0.03 0.07 0.12 -0.13193200
DM3969 -------------------------------------------------------------------
DM3969
DM3969.The coordinates were established by GPS observations
DM3969.and adjusted by the National Geodetic Survey in June 2019.
DM3969
DM3969.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DM3969.been affixed to the stable North American Tectonic Plate.
DM3969
DM3969.The coordinates are valid at the epoch date displayed above
DM3969.which is a decimal equivalence of Year/Month/Day.
DM3969
DM3969.Due to the release of the International GNSS Service (IGS) 2014
DM3969.realization of the International Terrestrial Reference Frame of 2014
DM3969.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DM3969.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DM3969.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DM3969.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DM3969.currently published epoch of 2010.00.
DM3969
DM3969.Additional information on MYCS2 is available at
DM3969.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DM3969
DM3969.The orthometric height was determined by GPS observations and a
DM3969.high-resolution geoid model using precise GPS observation and
DM3969.processing techniques.
DM3969
DM3969.Significant digits in the geoid height do not necessarily reflect accuracy.
DM3969.GEOID18 height accuracy estimate available here.
DM3969
DM3969.The PID for the CORS L1 Phase Center is DM3970.
DM3969
DM3969.Click photographs - Photos may exist for this station.
DM3969
DM3969.The XYZ, and position/ellipsoidal ht. are equivalent.
DM3969
DM3969.The ellipsoidal height was determined by GPS observations
DM3969.and is referenced to NAD 83.
DM3969
DM3969. The following values were computed from the NAD 83(2011) position.
DM3969
DM3969; North East Units Scale Factor Converg.
DM3969;SPC AL W - 431,595.830 701,942.810 MT 1.00006140 +0 36 52.3
DM3969;UTM 16 - 3,749,853.897 555,672.165 MT 0.99963821 +0 20 08.5
DM3969
DM3969! - Elev Factor x Scale Factor = Combined Factor
DM3969!SPC AL W - 0.99994787 x 1.00006140 = 1.00000927
DM3969!UTM 16 - 0.99994787 x 0.99963821 = 0.99958610
DM3969
DM3969_U.S. NATIONAL GRID SPATIAL ADDRESS: 16SEC5567249853(NAD 83)
DM3969
DM3969 SUPERSEDED SURVEY CONTROL
DM3969
DM3969 NAD 83(2011)- 33 53 15.27574(N) 086 23 52.59565(W) AD(2010.00) c
DM3969 ELLIP H (08/??/11) 332.083 (m) GP(2010.00) c c
DM3969 NAD 83(CORS)- 33 53 15.27620(N) 086 23 52.59663(W) AD(2002.00) c
DM3969 ELLIP H (10/??/10) 332.067 (m) GP(2002.00) c c
DM3969
DM3969.Superseded values are not recommended for survey control.
DM3969
DM3969.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DM3969.See file dsdata.pdf to determine how the superseded data were derived.
DM3969
DM3969_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DM3969
DM3969 STATION DESCRIPTION
DM3969
DM3969'DESCRIBED BY NATIONAL GEODETIC SURVEY 2019
DM3969'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DM3969'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DM3969'ACCESSIBLE AT THE WORLDWIDE WEB.
DM3969'https://geodesy.noaa.gov/CORS/data.shtml
DM3969'https://geodesy.noaa.gov/CORS
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