Mars - Dual-polarization radar observations with extended coverage

Details Mars - Dual-polarization radar observations with extended coverage Mars - Dual-polarization radar observations with extended coverage

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icar...62..110h&link_type=abstract

Icarus (ISSN 0019-1035), vol. 62, April 1985, p. 110-128.

Astronomy and Astrophysics

Astronomy

43

Mars Surface, Polarization Characteristics, Radar Astronomy, Data Reduction, Doppler Effect, Mars Craters, Mie Scattering, Radar Scattering, Viking Spacecraft, Mars, Polarization, Radar Methods, Observations, Wavelengths, Spectra, Backscatter, Surface, Depolarization, Terrain, Features, Topography, Plains, Volcanoes, Roughness, Comparisons, Imagery

Scientific paper

Thirteen-centimeter-wavelength radar observations of Mars made in 1982 at Arecibo Observatory yield accurate measurements of the full backscatter spectrum in two orthogonal polarizations. The data, which were obtained for several widely separated subradar longitudes at 24°N latitude, provide the first global view of the distribution of small-scale surface roughness on Mars. The diffuse component of the echo exhibits strong spatial variations. Areas of maximum depolarization correlate well with volcanic regions (Tharsis and Elysium), while the heavily cratered upland terrain yields relatively low depolarization. On the average, the northern Martian tropics yield higher diffuse radar cross sections (σD = 0.05 - 0.12) and a higher degree of disk-integrated depolarization (μc = 0.1 - 0.4) than is found for the Moon, Mercury, and Venus.

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