Accession Number : AD0284321

Title :   ON THE PRODUCTION OF AND SCATTER PROPAGATION FROM ARTIFICIAL IRREGULARITIES IN THE IONOSPHERIC D-LAYER

Corporate Author : TRW SPACE TECHNOLOGY LABS REDONDO BEACH CALIF

Personal Author(s) : GARDNER,JOHN H.

Report Date : JUN 1962

Pagination or Media Count : 1

Abstract : The possibility of utilizing irregularities produced in the ionospheric D-layer by rf heating or by intense optical radiation from lasers to enhance forward scatter propagation is considered. It is shown that, on the assumption that a reduction of electron density by a factor of two can be achieved at 70 km by rf heating with a one megawatt beam of 1 degree half-power width as calculated by Molmud, forward scatter propagation with reduction in power of about 50 db from line-of-sight propagation can be achieved for a disturbed ionosphere. If lasers are used to lay out a diffraction grating in the D-layer, similar results may be achieved with the received power proportional to the square of the number of grating lines and with the additional possibility of utilizing high-order spectra of the grating. (Author)

Descriptors :   *IONOSPHERE, *LASERS, *OPTICAL COMMUNICATIONS, *MASERS, ANTENNA RADIATION PATTERNS, ANTENNAS, COMMUNICATION THEORY, DENSITY, ELECTRONS, INTEGRAL TRANSFORMS, LIGHT, REFRACTIVE INDEX, RELIABILITY, RUBY, SIGNALS, ULTRAHIGH FREQUENCY

Distribution Statement : APPROVED FOR PUBLIC RELEASE