U.S. Geoid Heights (GEOID96)

Description

This 2' geoid height grid for the conterminous United States is the GEOID96 model. The computation used about 1.8 million terrestrial and marine gravity data held in the National Geodetic Survey gravity data base in July 1996. These data were augmented by gravity data contributions from NGA (former National Imagery and Mapping Agency (former Defence Mapping Agency)). By means of a Fast Fourier Transform (FFT) technique, high frequency corrections were made to an underlying EGM96 geopotential model through a remove, compute, and restore process. The gravity values are based on the International Gravity Standardization Net 1971 (IGSN71). The geoid heights are referred to the Geodetic Reference System 1980 (GRS80) ellipsoid. GEOID96 incorporates the reference system relationship between NAD 83(86) and ITRF94(1996.0), the datum offset of NAVD 88, and the contributions from 2951 GPS on leveled benchmarks. Additional information is available at http://www.ngs.noaa.gov/GEOID/geoid.htmlWe are particularly grateful to NGA (former National Imagery and Mapping Agency) for their assistance and their data contributions.

Resources

Name Format Description Link
21 se-0703.html https://www.ngdc.noaa.gov/mgg/fliers/se-0703.html
21 tablegri.html https://www.ngdc.noaa.gov/mgg/gravity/1999/document/html/tablegri.html
21 1999cd.html https://www.ngdc.noaa.gov/mgg/gravity/1999cd.html
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords

Tags

  • bouguer gravity
  • united states of america
  • land gravity
  • international council for science - world data system
  • nesdis
  • icsu-wds
  • absolute gravity
  • continent
  • national geophysical data center
  • noaa
  • satellite orbits
  • north america
  • gravity
  • u.s. department of commerce
  • observed gravity
  • earth science
  • doc/noaa/nesdis/ngdc
  • gridded gravity
  • solid earth
  • doc/noaa/nesdis/ncei
  • gravitational field
  • control surveys
  • free air anomaly
  • geodetics/gravity
  • national centers for environmental information
  • reference systems

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