Computer Science
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984rpeee..10....2f&link_type=abstract
In its USSR Rept.: Electron. and Elec. Eng. (JPRS-UEE-84-007) p 2 (SEE N84-26821 17-31) Transl. into ENGLISH from Izv. Vyssh.
Computer Science
Lunar Surface, Mapping, Radar Measurement, Surface Roughness, Data Processing, High Resolution, Perturbation Theory, Scattering Cross Sections
Scientific paper
Extensive radar studies of the Moon were made in the nineteen sixties and seventies, using wavelengths from 8.6 mm to 19 m, and the data were useful for high resolution lunar surface cartography. A composite two scale model was proposed for interpretation of the data, specifically the dependence of the scattering cross section on the wavelength and the incidence angle. The lunar relief is described statistically relative to the radius vector of a point on an ideal smooth spherical surface. The diffraction problem for radio waves at the Moon is solved on the basis of this model. With normal deviations of the real surface from the ideal one assumed to have a fairly small dispersion, according to the Rayleigh criterion, this problem for the fine structure is solved by the perturbation method. The directional pattern of scattering reveals at least two regions, each corresponding to a different scattering mechanism.
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