Simulation gravity modeling to spacecraft-tracking data - Analysis and application

Details Simulation gravity modeling to spacecraft-tracking data - Analysis and application Simulation gravity modeling to spacecraft-tracking data - Analysis and application

Nov 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.5455p&link_type=abstract

Journal of Geophysical Research, vol. 83, Nov. 10, 1978, p. 5455-5464.

Physics

17

Analog Simulation, Frequency Shift, Gravimetry, Line Of Sight Communication, Lunar Gravitation, Satellite Perturbation, Data Reduction, Doppler Navigation, Dynamic Models, Error Analysis, Gravitational Fields, Gravity Anomalies, Planetary Gravitation, Satellite Tracking

Scientific paper

It is proposed that line-of-sight gravity measurements derived from spacecraft-tracking data can be used for quantitative subsurface density modeling by suitable orbit simulation procedures. Such an approach avoids complex dynamic reductions and is analogous to the modeling of conventional surface gravity data. This procedure utilizes the vector calculations of a given gravity model in a simplified trajectory integration program that simulates the line-of-sight gravity. Solutions from an orbit simulation inversion and a dynamic inversion on Doppler observables compare well (within 1% in mass and size), and the error sources in the simulation approximation are shown to be quite small. An application of this technique is made to lunar crater gravity anomalies by simulating the complete Bouguer correction to several large young lunar craters. It is shown that the craters all have negative Bouguer anomalies.

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