Geoid Recovery Using Geophysical Inverse Theory Applied to Satellite to Satellite Tracking Data

Details Geoid Recovery Using Geophysical Inverse Theory Applied to Satellite to Satellite Tracking Data Geoid Recovery Using Geophysical Inverse Theory Applied to Satellite to Satellite Tracking Data

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000stin...0080262g&link_type=abstract

Technical Report, MG-103

Statistics

Computation

Celestial Mechanics, Procedures, Geopotential, Geoids, Satellite-To-Satellite Tracking, Computation, Spherical Harmonics, Simulation, Potential Theory, Gravitation, Geophysics, Fourier Series, Errors

Scientific paper

This report describes a new method for determination of the geopotential, or the equivalent geoid. It is based on Satellite-to-Satellite Tracking (SST) of two co-orbiting low earth satellites separated by a few hundred kilometers. The analysis is aimed at the GRACE Mission, though it is generally applicable to any SST data. It is proposed that the SST be viewed as a mapping mission. That is, the result will be maps of the geoid or gravity, as contrasted with determination of spherical harmonics or Fourier coefficients. A method has been developed, based on Geophysical Inverse Theory (GIT), that can provide maps at a prescribed (desired) resolution and the corresponding error map from the SST data. This computation can be done area by area avoiding simultaneous recovery of all the geopotential information. The necessary elements of potential theory, celestial mechanics, and Geophysical Inverse Theory are described, a computation architecture is described, and the results of several simulations presented. Centimeter accuracy geoids with 50 to 100 km resolution can be recovered with a 30 to 60 day mission.

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