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 16:13:33 EST
DM7490 ***********************************************************************
DM7490 CORS - This is a GPS Continuously Operating Reference Station.
DM7490 DESIGNATION - PORTMOLLERAK2006 CORS ARP
DM7490 CORS_ID - AC41
DM7490 PID - DM7490
DM7490 STATE/COUNTY- AK/ALEUTIANS EAST BOROUGH
DM7490 COUNTRY - US
DM7490 USGS QUAD -
DM7490
DM7490 *CURRENT SURVEY CONTROL
DM7490 ______________________________________________________________________
DM7490* NAD 83(2011) POSITION- 55 54 31.20704(N) 160 24 26.20977(W) ADJUSTED
DM7490* NAD 83(2011) ELLIP HT- 407.131 (meters) (01/??/23) ADJUSTED
DM7490* NAD 83(2011) EPOCH - 2010.00
DM7490 ______________________________________________________________________
DM7490 GEOID HEIGHT - 15.542 (meters) GEOID12B
DM7490 NAD 83(2011) X - -3,376,012.369 (meters) COMP
DM7490 NAD 83(2011) Y - -1,201,660.574 (meters) COMP
DM7490 NAD 83(2011) Z - 5,259,086.291 (meters) COMP
DM7490
DM7490 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
DM7490 Standards:
DM7490 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
DM7490 Horiz Ellip SD_N SD_E SD_h (unitless)
DM7490 -------------------------------------------------------------------
DM7490 NETWORK 0.15 0.44 0.07 0.05 0.23 0.10814200
DM7490 -------------------------------------------------------------------
DM7490
DM7490.The coordinates were established by GPS observations
DM7490.and adjusted by the National Geodetic Survey in January 2023.
DM7490
DM7490.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DM7490.been affixed to the stable North American Tectonic Plate.
DM7490
DM7490.The coordinates are valid at the epoch date displayed above
DM7490.which is a decimal equivalence of Year/Month/Day.
DM7490
DM7490.Due to the release of the International GNSS Service (IGS) 2014
DM7490.realization of the International Terrestrial Reference Frame of 2014
DM7490.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DM7490.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DM7490.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DM7490.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DM7490.currently published epoch of 2010.00.
DM7490
DM7490.Additional information on MYCS2 is available at
DM7490.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DM7490
DM7490.Significant digits in the geoid height do not necessarily reflect accuracy.
DM7490.GEOID12B height accuracy estimate available here.
DM7490
DM7490.The PID for the CORS L1 Phase Center is DM7491.
DM7490
DM7490.Click photographs - Photos may exist for this station.
DM7490
DM7490.The XYZ, and position/ellipsoidal ht. are equivalent.
DM7490
DM7490.The ellipsoidal height was determined by GPS observations
DM7490.and is referenced to NAD 83.
DM7490
DM7490. The following values were computed from the NAD 83(2011) position.
DM7490
DM7490; North East Units Scale Factor Converg.
DM7490;UTM 04 - 6,196,809.511 412,027.403 MT 0.99969492 -1 09 55.8
DM7490
DM7490! - Elev Factor x Scale Factor = Combined Factor
DM7490!UTM 04 - 0.99993625 x 0.99969492 = 0.99963119
DM7490
DM7490_U.S. NATIONAL GRID SPATIAL ADDRESS: 4UDG1202796809(NAD 83)
DM7490
DM7490 SUPERSEDED SURVEY CONTROL
DM7490
DM7490 NAD 83(2011)- 55 54 31.20801(N) 160 24 26.21122(W) AD(2010.00) c
DM7490 ELLIP H (09/??/21) 407.125 (m) GP(2010.00) c c
DM7490 NAD 83(2011)- 55 54 31.21061(N) 160 24 26.21809(W) AD(2010.00) c
DM7490 ELLIP H (10/??/20) 407.131 (m) GP(2010.00) c c
DM7490 NAD 83(2011)- 55 54 31.21467(N) 160 24 26.22270(W) AD(2010.00) c
DM7490 ELLIP H (06/??/19) 407.142 (m) GP(2010.00) c c
DM7490 NAD 83(2011)- 55 54 31.21467(N) 160 24 26.22261(W) AD(2010.00) c
DM7490 ELLIP H (12/??/11) 407.129 (m) GP(2010.00) c c
DM7490 NAD 83(CORS)- 55 54 31.21378(N) 160 24 26.21847(W) AD(2003.00) c
DM7490 ELLIP H (05/??/11) 407.135 (m) GP(2003.00) c c
DM7490
DM7490.Superseded values are not recommended for survey control.
DM7490
DM7490.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DM7490.See file dsdata.pdf to determine how the superseded data were derived.
DM7490
DM7490_MARKER: STATION IS THE ANTENNA REFERENCE POINT OF THE GPS ANTENNA
DM7490
DM7490 STATION DESCRIPTION
DM7490
DM7490'DESCRIBED BY NATIONAL GEODETIC SURVEY 2023
DM7490'STATION IS PART OF THE NOAA CORS NETWORK. LATEST INFORMATION INCLUDING
DM7490'POSITIONS AND VELOCITIES ARE AVAILABLE IN THE COORDINATE AND LOG FILES
DM7490'ACCESSIBLE AT THE WORLDWIDE WEB.
DM7490'https://geodesy.noaa.gov/CORS/data.shtml
DM7490'https://geodesy.noaa.gov/CORS
1 National Geodetic Survey, Retrieval Date = FEBRUARY 19, 2025 16:13:33 EST
DM7492 ***********************************************************************
DM7492 CORS - This is a GPS Continuously Operating Reference Station.
DM7492 DESIGNATION - PORTMOLLERAK2006 CORS GRP
DM7492 CORS_ID - AC41
DM7492 PID - DM7492
DM7492 STATE/COUNTY- AK/ALEUTIANS EAST BOROUGH
DM7492 COUNTRY - US
DM7492 USGS QUAD -
DM7492
DM7492 *CURRENT SURVEY CONTROL
DM7492 ______________________________________________________________________
DM7492* NAD 83(2011) POSITION- 55 54 31.20704(N) 160 24 26.20977(W) ADJUSTED
DM7492* NAD 83(2011) ELLIP HT- 407.123 (meters) (01/??/23) ADJUSTED
DM7492* NAD 83(2011) EPOCH - 2010.00
DM7492 ______________________________________________________________________
DM7492 GEOID HEIGHT - 15.542 (meters) GEOID12B
DM7492 NAD 83(2011) X - -3,376,012.365 (meters) COMP
DM7492 NAD 83(2011) Y - -1,201,660.572 (meters) COMP
DM7492 NAD 83(2011) Z - 5,259,086.284 (meters) COMP
DM7492 LAPLACE CORR - -1.83 (seconds) DEFLEC12B
DM7492
DM7492 Network accuracy estimates per FGDC Geospatial Positioning Accuracy
DM7492 Standards:
DM7492 FGDC (95% conf, cm) Standard deviation (cm) CorrNE
DM7492 Horiz Ellip SD_N SD_E SD_h (unitless)
DM7492 -------------------------------------------------------------------
DM7492 NETWORK 0.15 0.44 0.07 0.05 0.23 0.10814200
DM7492 -------------------------------------------------------------------
DM7492
DM7492.The horizontal coordinates were established by GPS observations
DM7492.and adjusted by the National Geodetic Survey in January 2023.
DM7492
DM7492.NAD 83(2011) refers to NAD 83 coordinates where the reference frame has
DM7492.been affixed to the stable North American Tectonic Plate.
DM7492
DM7492.The horizontal coordinates are valid at the epoch date displayed above
DM7492.which is a decimal equivalence of Year/Month/Day.
DM7492
DM7492.Due to the release of the International GNSS Service (IGS) 2014
DM7492.realization of the International Terrestrial Reference Frame of 2014
DM7492.(ITRF2014), NGS reprocessed all NOAA CORS Network and some IGS stations
DM7492.using data collected between 1/1/1996 and 1/30/2017. The resulting ITRF2014
DM7492.epoch 2010.00 coordinates, referred to as Multi-Year CORS Solution 2
DM7492.(MYCS2), were transformed to NAD 83 (2011/PA11/MA11) maintaining the
DM7492.currently published epoch of 2010.00.
DM7492
DM7492.Additional information on MYCS2 is available at
DM7492.https://geodesy.noaa.gov/CORS/news/mycs2/mycs2.shtml
DM7492
DM7492.Significant digits in the geoid height do not necessarily reflect accuracy.
DM7492.GEOID12B height accuracy estimate available here.
DM7492
DM7492.Click photographs - Photos may exist for this station.
DM7492
DM7492.The XYZ, and position/ellipsoidal ht. are equivalent.
DM7492
DM7492.The Laplace correction was computed from DEFLEC12B derived deflections.
DM7492
DM7492.The ellipsoidal height was determined by GPS observations
DM7492.and is referenced to NAD 83.
DM7492
DM7492. The following values were computed from the NAD 83(2011) position.
DM7492
DM7492; North East Units Scale Factor Converg.
DM7492;SPC AK 7 - 213,603.300 599,593.688 MT 1.00002162 +1 19 08.8
DM7492;UTM 04 - 6,196,809.511 412,027.403 MT 0.99969492 -1 09 55.8
DM7492
DM7492! - Elev Factor x Scale Factor = Combined Factor
DM7492!SPC AK 7 - 0.99993625 x 1.00002162 = 0.99995787
DM7492!UTM 04 - 0.99993625 x 0.99969492 = 0.99963119
DM7492
DM7492_U.S. NATIONAL GRID SPATIAL ADDRESS: 4UDG1202796809(NAD 83)
DM7492
DM7492 SUPERSEDED SURVEY CONTROL
DM7492
DM7492 NAD 83(2011)- 55 54 31.20801(N) 160 24 26.21122(W) AD(2010.00) A
DM7492 ELLIP H (09/??/21) 407.117 (m) GP(2010.00) 4 1
DM7492 NAD 83(2011)- 55 54 31.21061(N) 160 24 26.21809(W) AD(2010.00) A
DM7492 ELLIP H (10/??/20) 407.123 (m) GP(2010.00) 4 1
DM7492 NAD 83(2011)- 55 54 31.21467(N) 160 24 26.22270(W) AD(2010.00) A
DM7492 ELLIP H (06/??/19) 407.134 (m) GP(2010.00) 4 1
DM7492 ELLIP H (03/30/15) 407.127 (m) GP(2010.00) 0 0
DM7492 NAD 83(2011)- 55 54 31.21497(N) 160 24 26.22134(W) AD(2010.00) 0
DM7492 NAD 83(2011)- 55 54 31.21467(N) 160 24 26.22261(W) AD(2010.00) A
DM7492 ELLIP H (12/??/11) 407.120 (m) GP(2010.00) 4 1
DM7492 NAD 83(CORS)- 55 54 31.21378(N) 160 24 26.21847(W) AD(2003.00) A
DM7492 ELLIP H (05/??/11) 407.126 (m) GP(2003.00) 4 1
DM7492
DM7492.Superseded values are not recommended for survey control.
DM7492
DM7492.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
DM7492.See file dsdata.pdf to determine how the superseded data were derived.
DM7492
DM7492_STAMPING: UNKNOWN
DM7492
DM7492 STATION DESCRIPTION
DM7492
DM7492'THIS MONUMENT IS ASSOCIATED WITH CORS SITE 'AC41'
DM7492'LATEST INFORMATION INCLUDING POSITIONS AND VELOCITIES
DM7492'ARE AVAILABLE IN THE COORDINATE AND LOG FILES ACCESSIBLE
DM7492'BY ANONYMOUS FTP OR THE WORLDWIDE WEB.
DM7492' https://geodesy.noaa.gov/corsdata/coord/coord_14
DM7492' https://geodesy.noaa.gov/corsdata/station_log
DM7492' https://geodesy.noaa.gov/CORS
DM7492'RECOVERED AS DESCRIBED.
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