Vertical-structure effects on planetary microwave brightness temperature measurements - Applications to the lunar regolith

Details Vertical-structure effects on planetary microwave brightness temperature measurements - Applications to the lunar regolith Vertical-structure effects on planetary microwave brightness temperature measurements - Applications to the lunar regolith

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...48..201k&link_type=abstract

Icarus, vol. 48, Nov. 1981, p. 201-229.

Astronomy and Astrophysics

Astronomy

5

Brightness Temperature, Dielectric Properties, Lunar Soil, Lunar Surface, Microwave Emission, Regolith, Astronomical Models, Microwave Radiometers, Periodic Variations, Planetary Surfaces, Remote Sensing, Surface Properties, Planets, Moon, Regolith, Microwaves, Brightness, Temperature, Density, Dielectric Properties, Structure, Soil, Layers, Thickness, Reflectivity, Depth, Amplitude, Models, Emissions, Calculations, Wavelengths, Radar Methods, Polarization, Electrical Properties

Scientific paper

An attempt to constrain the effects of vertical variations in dielectric properties on lunar microwave observations is presented. A numerical approach for deriving the reflectivity and microwave weighting function of a vertically varying half-space is used, assuming variance in the dielectric properties with depth only, and negligible magnetic effects. The cases of continuous and stratified models of vertical structures are discussed, and a concentration of emitted energy in upper layers is found. The total emitted energy oscillates, varying with the thickness of the upper soil layer, but averaging out interference effects due to random variations in the substrate depth. Consideration is also given to the vertical structure effects on the lunation-mean disk-center brightness temperature, its variations, and the regolith electrical loss, and predicted reflectivity effects by feasible models of the lunar regolith dielectric profile.

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