Measurements of Lunar Radiation in the Wavelength Range Centred at 1.2 mm

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Abstract
The results of several investigations of the lunar surface thermal properties are reported including observational and theoretical considerations of the effect of roughness on the polarization of this radiation. It is concluded that roughness plays an important part in determining the millimetre wavelength thermal emission of the Moon. In particular the difference in temperature between Moon and highlands and the observed poleward darkening function may be attributed to roughness. An effective dielectric constant for the surface material is deduced and a tentative model for the centimetre scale roughness of the surface advanced. It appears that roughness increases as the scale on which it is observed decreases.

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