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This report presents an abbreviated summary of theoretical studies made by a group at the Research Laboratory of Electronics, Massachusetts Institute of Technology, under contract with the Air Navigation Development Board of the Department of Commerce. The details of the analysis and the results have been treated more comprehensively in two technical reports of the Research Laboratory of Electronics.

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A m ethod is d escribed for predict ing t he fast fa ding r ate of moon-reflected sig nals. It is b ase d entirely upon consid erations of t he observer-moon posit ions a nd r elative mo t ions. Exp erimental results which ar e in good agreement with t llC compu ted fad in g rates have been obtained from a moon-refl ection exp erim ent at a frequency of 4 12 m egacycles p et' second. So me possible implication s of t h is method of interpret ing fad ing r ates a re given.