Physics
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990geoji.100..369p&link_type=abstract
Geophysical Journal International (ISSN 0955-419X), vol. 100, March 1990, p. 369-378.
Physics
21
Geopotential, Gravitational Fields, Gravity Anomalies, Topography, Gravitational Constant, Mathematical Models, Orbit Perturbation, Polar Regions, Satellite Altimetry
Scientific paper
Consideration is given to the possibility of combining low-degree satellite-derived geopotential models with the harmonic coefficients of the topographic-isostatic potential implied by the Airy/Heiskanen isostatic hypothesis. The compilation of a topographic database providing information pertaining to terrain type classification is discussed. The formulation for the determination of harmonic coefficients of the topographic-isostatic potential is extended beyond to cases discussed by Lachapelle (1976) to include various terrain types. This formulation and the series expansion approach of Rummel et al. (1988) are implemented for potential coefficient determinations complete to degree and order 360. The topographic-isostatic coefficients are used with satellite-derived geopotential models to estimate mean gravity anomalies. The results are compared with observations to evaluate the quality of different estimation procedures.
Pavlis Nikolaos K.
Rapp Richard H.
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