Regoliths of icy satellites: The coherent backscatter model

Details Regoliths of icy satellites: The coherent backscatter model Regoliths of icy satellites: The coherent backscatter model

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept..323h&link_type=abstract

In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 323 (SEE N92-10728 01-91)

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Backscattering, Circular Polarization, Coherent Scattering, Icy Satellites, Radar Data, Radar Scattering, Regolith, Discontinuity, Laser Applications, Polystyrene, Radio Waves, Refractivity, Spheres

Scientific paper

The coherent backscatter model of radar scattering from icy satellites argues that most of the received power comes from radio waves that have been multiply scattered from numerous refractive index discontinuities randomly located under the surfaces of the regoliths. In a laboratory analog experiment the circular and linear polarizations were measured in light scattered from a suspension of polystyrene spheres in water illuminated by laser. Results confirm that coherent backscatter from particle media reproduces the large intensity and unusual polarizations observed in the radar data. The model implies that the regoliths of icy satellites consist of matrices of small reflective index containing imbedded scatterers separated by distances of the order of a wavelength.

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