TIME CORRELATIONS IN FORWARD SCATTERING BY RANDOM DISTRIBUTIONS.
Final rept. 1 Apr 66-31 Mar 68,
SYLVANIA ELECTRONIC SYSTEMS-WEST MOUNTAIN VIEW CALIF
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Experimental data are given for time-correlations in the forward scattering of 5-mm microwaves by moving random distributions of identical spheres. The component scatterers of the distributions are styrofoam spheres with radii large compared to the wavelength and with relative indices of refraction close to unity the motion of the spheres arises from turbulent air streams flowing through grids that form the top and bottom of a styrofoam container. The experimental results include the autocorrelation functions for the phase-quadrature components, and the self coherence function constructed by the autocorrelation and cross-correlation functions. The results were obtained by digitally analyzing tape recordings of the instantaneous signals. Data obtained in real time by processing the instantaneous signals with an electronic analog computer are also given to provide preliminary checks on the digital analyses. Author
- Radiofrequency Wave Propagation