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EGM96 - The NASA GSFC and NIMA Joint Geopotential Model
Entry ID: EGM96_NASA-NIMA
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Summary
Abstract: EGM96 is a geopotential model of the Earth consisting of spherical harmonic
coefficients complete to degree and order 360. It is a composite solution,
consisting of: (1) a combination solution to degree and order 70; (2) a block
diagonal solution from degree 71 to 359; and (3) the quadrature solution at
degree 360. This model, just completed, is the result of a collaboration
between the National Imagery and Mapping Agency, the NASA Goddard Space Flight
Center, and the Ohio State University.

The joint project took advantage of new surface gravity data from many
different regions of the globe, including data newly released from the NIMA
archives. Major terrestrial gravity acquistions by NIMA since 1990 include
airborne gravity surveys over Greenland and parts of the Arctic and the
Antarctic, surveyed by the Naval Research Lab (NRL), and cooperative gravity
collection projects, several which were undertaken with the University of
Leeds. These collection efforts have improved the data holdings over many of
the world's land areas, including Africa, Canada, parts of South America and
Africa, Southeast Asia, Eastern Europe, and the former Soviet Union. In
addition, there have been major efforts so improve NIMA's existing 30' mean
anomaly database through contributions over various countries in Asia.

NIMA also computed and made available 30'x30' mean altimeter derived gravity
anomalies from the GEOSAT Geodetic Mission. EGM96 also included altimeter
derived anomalies derived from ERS-1 by Kort and Matrikelstyrelsen (KMS),
(National Survey and Cadastre, Denmark) over portions of the Arctic, and the
Antarctic, as well as the altimeter derived anomalies of Schoene [1996] over
the Weddell Sea. The statistics of the final merged set of surface gravity data
used in EGM96 are summarized at
http://cddis.gsfc.nasa.gov/926/egm96/gendesc.html
Related URL
Link: GET RELATED DATA SET METADATA (DIF)
Description: Data sets that have used EGM-96.

Link: GET SERVICE
Description: Access the model Coefficients and other products.
Service Citation
Title: EGM96 - The NASA GSFC and NIMA Joint Geopotential Model
Provider: NASA GSFC and NIMA
URL: http://cddis.gsfc.nasa.gov/926/egm96/egm96.html
Service Keywords
MODELS >COMPONENT PROCESS MODELS   [Definition]
MODELS >LAND SURFACE MODELS   [Definition]
Science Keywords
LAND SURFACE >TOPOGRAPHY >TOPOGRAPHICAL RELIEF   [Definition]
LAND SURFACE >TOPOGRAPHY >TERRAIN ELEVATION   [Definition]
SOLID EARTH >GRAVITY/GRAVITATIONAL FIELD >CRUSTAL MOTION   [Definition]
SOLID EARTH >GRAVITY/GRAVITATIONAL FIELD >GRAVITATIONAL FIELD   [Definition]
SOLID EARTH >GRAVITY/GRAVITATIONAL FIELD >GRAVITY   [Definition]
SOLID EARTH >GRAVITY/GRAVITATIONAL FIELD >SATELLITE ORBITS/REVOLUTION   [Definition]
SOLID EARTH >GRAVITY/GRAVITATIONAL FIELD   [Definition]
ISO Topic Category
ELEVATION
GEOSCIENTIFIC INFORMATION
Platform
ERS-1 >European Remote Sensing Satellite-1   [Information]
TOPEX/POSEIDON >Ocean Topography Experiment   [Information]
Instrument
SLR >Satellite Laser Ranging   [Information]
GPS >Global Positioning System   [Information]
DORIS >Doppler Orbitography and Radiopositioning Integrated by Satellite   [Information]
Service Provider
National Geospatial-Intelligence Agency, U. S. Department of Defense

Service Provider Personnel
Name: GENERAL HELP DESK NGA
Phone: 1-800-455-0899
Email: queries1 at nga.mil
Contact Address:
Public Affairs Division, MS D-54
4600 Sangamore Road
 City: Bethesda
Province or State: Maryland
Postal Code: 20816-5003
Country: USA


Crustal Dynamics Data Information System, Solar System Exploration Division, Goddard Space Flight Center, NASA

Service Provider Personnel
Name: CAREY NOLL
Phone: 301-614-6542
Fax: 301-614-6015
Email: Carey.E.Noll at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 690
 City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
Personnel
FRANK G. LEMOINE
Role: TECHNICAL CONTACT
Phone: +1 301 614-6109
Fax: +1 301 614-6099
Email: Frank.G.Lemoine at nasa.gov
Contact Address:
GSFC/NASA
Code 697.0
City: Greenbelt
Province or State: Maryland
Postal Code: 20771
Country: USA

TYLER B. STEVENS
Role: SERF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
Creation and Review Dates
SERF Creation Date: 2005-04-04
SERF Last Revision Date: 2011-08-19
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