Other
Scientific paper
Nov 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979stin...8014002w&link_type=abstract
Final Report International Technical Associates, Inc., Long Beach, CA.
Other
Computer Programs, Light Scattering, Planetary Surfaces, Polarimetry, Reflectance, Surface Properties, Asteroids, Mars Surface, Mercury (Planet), Moon, Saturn Rings, Surface Roughness Effects
Scientific paper
Wolff's computer model of a rough planetary surface was simplified and revised. Close adherence to the actual geometry of a pitted surface and the inclusion of a function for diffuse light resulted in a quantitative model comparable to observations by planetary satellites and asteroids. A function is also derived to describe diffuse light emitted from a particulate surface. The function is in terms of the indices of refraction of the surface material, particle size, and viewing angles. Computer-generated plots describe the observable and theoretical light components for the Moon, Mercury, Mars and a spectrum of asteroids. Other plots describe the effects of changing surface material properties. Mathematical results are generated to relate the parameters of the negative polarization branch to the properties of surface pitting. An explanation is offered for the polarization of the rings of Saturn, and the average diameter of ring objects is found to be 30 to 40 centimeters.
Wolff Maxime
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