Accession Number : AD0283671

Title :   THE DIFFRACTION OF HIGH FREQUENCY RADIO WAVES BY IRREGULARITIES IN THE IONOSPHERE WITH EMPHASIS ON WAVES EMANATING FROM ARTIFICIAL EARTH SATELLITES

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK IONOSPHERE RESEARCH LAB

Personal Author(s) : DEBARBER,J.P.

Report Date : 15 SEP 1962

Pagination or Media Count : 1

Abstract : A diffraction theory is developed for a model in which the irregularities are confined to a slab. In the slab the refractive index is assumed to be a random function of position having a Gaussian autocorrelation function. The statistical parameters of the diffraction pattern on the ground are calculated for the case when the slab is illuminated by a stationary point source. Second, the dynamic characteristics of the diffraction pattern for a moving source are examined and applied to methods of determining the altitude, size, shape, and orientation of the irregularities. The methods involve simultaneous recording of signal amplitude at spaced receiving stations. Graphical and analytical procedures are developed to handle the complex geometry problems. Finally, the results of experiments utilizing the 54 mc radiation of Transit 4A are presented and conclusions are drawn. (Author)

Descriptors :   *IONOSPHERE, ATTENUATION, DIFFRACTION, INSTRUMENTATION, RADIO WAVES, SATELLITES (ARTIFICIAL), VERY HIGH FREQUENCY

Distribution Statement : APPROVED FOR PUBLIC RELEASE