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 method

Details 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 method 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 method

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992stin...9429737f&link_type=abstract

Final Technical Report Woods Hole Oceanographic Inst., MA. Dept. of Geology and Geophysics.

Physics

Geophysics

Gravimetry, Gravitational Fields, Gravity Anomalies, Harmonic Functions, Planetary Gravitation, Spline Functions, Venus (Planet), Data Reduction, Extrapolation, Interpolation, Line Of Sight, Planetary Crusts, Planetary Structure, Potential Fields

Scientific paper

To 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.

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