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High resolution gravity models combining terrestrial and satellite dataSpherical harmonic expansions to degree 360 have been developed that combine satellite potential coefficient information, terrestrial gravity data, satellite altimeter information as a direct tracking data type and topographic information. These models define improved representations of the Earth's gravitational potential beyond that available from just satellite or terrestrial data. The development of the degree 360 models, however, does not imply a uniform accuracy in the determination of the gravity field as numerous geographic areas are devoid of terrestrial data or the resolution of such data is limited to, for example, 100 km. This paper will consider theoretical and numerical questions related to the combination of the various data types. Various models of the combination process are discussed with a discussion of various correction terms for the different models. Various sources of gravity data will be described. The new OSU91 360 model will be discussed with comparisons made to previous 360 models and to other potential coefficient models that are complete to degree 50. Future directions in high degree potential coefficient models will be discussed.
Document ID
19930071963
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Rapp, Richard H.
(NASA Headquarters Washington, DC United States)
Pavlis, Nikolaos K.
(NASA Headquarters Washington, DC United States)
Wang, Yan M.
(Ohio State Univ. Columbus, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1992
Publication Information
Publication: In: From Mars to Greenland: Charting gravity with space and airborne instruments - Fields, tides, methods, results (A93-55951 24-46)
Publisher: Springer-Verlag
Subject Category
Geophysics
Accession Number
93A55960
Funding Number(s)
CONTRACT_GRANT: JPL-958121
CONTRACT_GRANT: NAG5-781
Distribution Limits
Public
Copyright
Other

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