Dual-polarization radar observations of Mars - Tharsis and environs

Details Dual-polarization radar observations of Mars - Tharsis and environs Dual-polarization radar observations of Mars - Tharsis and environs

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982icar...52..171h&link_type=abstract

Icarus, vol. 52, Oct. 1982, p. 171-187.

Astronomy and Astrophysics

Astronomy

32

Continuous Wave Radar, Mars Surface, Radar Astronomy, Radar Scattering, Graphs (Charts), Polarization (Waves), Power Spectra, Spectral Reflectance, Spectrum Analysis, Mars, Polarization, Radar, Observations, Tharsis Region, Scattering, Power, Spectra, Source, Tharsis Ridge, Volcanoes, Maps, Features, Echos, Data, Doppler Observations, Mapping, Longitude, Latitude, Diagrams, Surface, Structure, Analysis, Characteristics

Scientific paper

Results are presented of dual-polarization CW radar observations of Mars made at Arecibo during the 1980 opposition. The observations are approximately centered on the Tharsis Ridge. It is noted that a large proportion of the echo from this region is in the form of diffuse-depolarized scatter. The strongest depolarization is seen as coming from the Tharsis Ridge, although detectable power is observed in both polarizations out to each limb. The peak of the depolarization enhancement is found to coincide with the longitudes of the major Tharsis volcanoes. Whereas it is clear that the depolarization cannot be confined solely to these volcanic shields, it is thought likely that most of the enhanced depolarization derives from extreme decimeter-scale roughness of volcanic origin. The existence of extensive lava flows over the Tharsis plains is seen as supporting this view.

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