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The influence of the atmosphere on geoid and potential coefficient determinations from gravity dataFor the precise computation of geoid undulations the effect of the attraction of the atmosphere on the solution of the basic boundary value problem of gravimetric geodesy must be considered. This paper extends the theory of Moritz for deriving an atmospheric correction to the case when the undulations are computed by combining anomalies in a cap surrounding the computation point with information derived from potential coefficients. The correction term is a function of the cap size and the topography within the cap. It reaches a value of 3.0 m for a cap size of 30 deg, variations on the decimeter level being caused by variations in the topography. The effect of the atmospheric correction terms on potential coefficients is found to be small, reaching a maximum of 0.0055 millionths at n = 2, m = 2 when terrestrial gravity data are considered. The magnitude of this correction indicates that in future potential coefficient determination from gravity data the atmospheric correction should be made to such data.
Document ID
19770031692
Document Type
Reprint (Version printed in journal)
Authors
Rummel, R. (Ohio State Univ. Columbus, OH, United States)
Rapp, R. H. (Ohio State University Columbus, Ohio, United States)
Date Acquired
August 9, 2013
Publication Date
November 10, 1976
Publication Information
Publication: Journal of Geophysical Research
Volume: 81
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAS6-2484
Distribution Limits
Public
Copyright
Other