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Cassini Radar Mission: Reconnaissance of Titan

The Cassini Radar will provide surface mapping of Saturn’s satellite Titan at 14 GHz (Ku band) with resolution as fine as 0.5 k m , unaffected by solar illumination, atmospheric opacity or scattering. The radar’s SAR mode provides medium-to-high resolution synthetic aperture radar images; its altimeter mode measures the relative surface elevation of the suborbital tracks; its scatterometer mode measures Titan’s surface backscatter coefficients at various angles; and its radiometer mode measures surface brightness temperature. In addition to characterization of gross morphology and landforms, the radar will reveal statistical measures of wave structures on liquid surfaces and solid surface roughness at spatial scales near the radar wavelength. Given a nominal mission profile, the sensor is capable of mapping almost 100% of Titan’s surface using its radiometer and 30% at SAR resolution. This combination will permit identification of major terrain units and characterization of principal surface modification processes.