A simulator of Cassini RADAR imaging mode

Details A simulator of Cassini RADAR imaging mode A simulator of Cassini RADAR imaging mode

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999dps....31.4105o&link_type=abstract

American Astronomical Society, DPS meeting #31, #41.05

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Scientific paper

The RADAR experiment on-board the Cassini spacecraft is a multimode instrument primarily designed for the study of the surface of Titan. Its imaging mode will provide for the first time geomorphological information on 10-30% of Titan's surface. Given the great uncertainties about the nature of Titan's surface and the possible presence of unique features, like lakes of liquid hydrocarbons, the correct interpretation of the results obtained by Cassini RADAR will require an extensive modellization of the radar system functioning and of the surface reflectivity, both in terms of dielectrical constant and of backscattering geometry. A software package is now being developed, simulating the imaging of Titan's surface by the Cassini orbiter RADAR experiment. The simulator computes the values for the radar parameters which are appropriate for a given flyby, and, given a time for the beginning of the observation, simulates the pulse transmission, the surface backscattering, the echo reception and sampling of the radar, and the processing of the sampled echoes. We conduct simulations of the appearance of various expected geological structures in Titan's crust (crater, ridges, etc.) under various assumptions about composition (pure water ice, water-rock mixtures, etc.). We then add material of contrasting dielectric properties representing solid and liquid hydrocarbons, to determine the detectability of such material with varying thicknesses of deposition inside and atop these landforms.

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