The analysis of radar echoes from the Moon

作者：Donald G. Rea, Norris S. Hetherington, R. Mifflin · 发表于：Journal of Geophysical Research Atmospheres · 年份：1964 · DOI：10.1029/jz069i024p05217 · 被引用次数：33 · 研究领域：Planetary Science and Exploration、Geophysics and Gravity Measurements、Scientific Research and Discoveries

The 68-cm radar echoes from the moon are interpreted with the approximation that the scattering can be described by the laws of geometric optics. The treatment relates the observed angular power spectrum directly with the distribution of surface normals, and no assumed functional dependence of the surface correlation function is required. A simple calculation gives a dielectric constant of 2.6 to 2.8, an average slope of 11° to 14°, and an rms slope of 15° to 23°. The depolarization data and the contour of the angular power spectrum are used in selecting these values from the different possible sets. The reduction technique has the added feature that the derived formulas can be used directly to calculate the microwave emissivity as a function of both angle and polarization.