Empirical data have been obtained from which estimates of the bistatic reflection coefficient,sigma sub o,have been determined. Measurements were made on two terrain types (grassy terrain and an area of tall weeds and rough ground) at bistatic angles of 70, 75, 80,and 85deg. low grazing angles and 0to 180deg. azimuth angle. The terrain was irradiated at wavelengths of 3cm and 23cm with horizontal polarization. Both like and orthogonal polarizations were received at each wavelength;four channels of data were recorded. The measurement technique utilized an aircraft with the 3cm and 23cm transmitters on board;the receivers were mounted on a tower. The transmissions were pulsed,and coherent signals were recorded by utilizing a separate air-to-ground link for the receiver local oscillator signal. This report presents the design considerations of the experiment,the complete experimental results,the results of the data analysis as well as a detailed documentation of the instrumentation and the data analysis procedures. (Author)
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