Global and regional resolution studies of Magellan gravity data - Implications for inferring lithospheric thickness

Details Global and regional resolution studies of Magellan gravity data - Implications for inferring lithospheric thickness Global and regional resolution studies of Magellan gravity data - Implications for inferring lithospheric thickness

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..667j&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 667.

Computer Science

Lithosphere, Venus Surface, Tectonics, Magellan Spacecraft (Nasa), Line Of Sight, Spectral Resolution

Scientific paper

Establishing temporal and spatial variations in lithospheric thickness on Venus is crucial to our understanding of the thermal and tectonic history of the planet. Magellan gravity and topography data, combined with a flexural model of compensation, in theory allow us to estimate lithospheric thickness globally, constraining the present day thermal boundary layer thickness: however, we are hindered by the varying spatial resolution of the gravity data, which places a lower bound on our estimates of lithospheric thickness and controls whether we can distinguish between dynamic and static compensation mechanisms. We present global and regional analyses of the maximum resolution available from Cycle 5 and Cycle 6 Magellan gravity data, and we discuss the implications of our results for estimating lithospheric thickness. The availability of the complete Cycle 5 and 6 gravity data allows the extension of earlier, spatially limited, resolution studies using Doppler velocity residuals and a multitaper spectral estimation technique. The effects of spacecraft altitude, viewing geometry and noise on the resolution in the data are investigated globally.

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