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Analysis of crustal structure of Venus utilizing residual Line-of-Sight (LOS) gravity acceleration and surface topography data. A trial of global modeling of Venus gravity field using harmonic spline methodTo construct Venus' gravity disturbance field (or gravity anomaly) with the spacecraft-observer line of site (LOS) acceleration perturbation data, both a global and a local approach can be used. The global approach, e.g., spherical harmonic coefficients, and the local approach, e.g., the integral operator method, based on geodetic techniques are generally not the same, so that they must be used separately for mapping long wavelength features and short wavelength features. Harmonic spline, as an interpolation and extrapolation technique, is intrinsically flexible to both global and local mapping of a potential field. Theoretically, it preserves the information of the potential field up to the bound by sampling theorem regardless of whether it is global or local mapping, and is never bothered with truncation errors. The improvement of harmonic spline methodology for global mapping is reported. New basis functions, a singular value decomposition (SVD) based modification to Parker & Shure's numerical procedure, and preliminary results are presented.
Document ID
19940025234
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Fang, Ming
(Woods Hole Oceanographic Inst. MA, United States)
Bowin, Carl
(Woods Hole Oceanographic Inst. MA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1992
Subject Category
Lunar And Planetary Exploration
Report/Patent Number
NASA-CR-195799
NAS 1.26:195799
Accession Number
94N29737
Funding Number(s)
CONTRACT_GRANT: NAG2-768
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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