Mathematics – Probability
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982itap...30..438s&link_type=abstract
IEEE Transactions on Antennas and Propagation, vol. AP-30, May 1982, p. 438-449.
Mathematics
Probability
22
Electromagnetic Scattering, Lunar Surface, Radar Scattering, Specular Reflection, Surface Roughness Effects, Bistatic Reflectivity, Error Analysis, Lunar Maria, Root-Mean-Square Errors, Scattering Functions
Scientific paper
Bistatic radar observations of quasi-specular scatter from the lunar surface at 13 and 116 cm wavelengths have been expressed in terms of probability densities of the underlying surface slope distributions. These show best agreement with a Hagfors scattering function, although other forms having predominantly Gaussian or exponential characteristics also occur. Estimates of root mean square (rms) surface slope derived from these function range from 4 deg rms in maria to at least 8 deg rms in highlands. These are values appropriate to 25 m horizontal scales and represent averages over tens of square kilometers of surface area. The effective scattering roughness varies with wavelength, most strongly in maria, where its behavior is consistent with that expected from an immature, i.e., unsaturated cratered surface. There is very little variation in scattering roughness with wavelength in highlands area.
Simpson Richard A.
Tyler Leonard G.
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