Accession Number : AD0648002

Title :   ELECTROMAGNETIC PULSE PROPAGATION IN A DISTURBED TERRESTRIAL WAVEGUIDE.

Descriptive Note : Technical rept.,

Corporate Author : INSTITUTES FOR ENVIRONMENTAL RESEARCH BOULDER COLO

Personal Author(s) : Johler,J. Ralph

Report Date : DEC 1966

Pagination or Media Count : 77

Abstract : Previous papers which treat pulse propagation (with special reference to the nuclear pulse) assume the ionosphere to be 'normal.' Thus, a theoretical model of the ionosphere has been employed which represents undisturbed conditions. This paper extends this propagation analysis to a disturbed condition resulting from the ionizing radiation of nuclear debris spread over a large area. The effect of the debris on the transforms for the propagation medium together with the detailed dispersion of a particular pulse are considered. The lowering of the ionosphere reflection height at low frequencies causes shorter propagation times for the pulses reflected from the ionosphere. The effect causes considerable change in the form or shape of the observed composite pulse at great distance from the source. (Author)

Descriptors :   (*ELECTROMAGNETIC PULSES, NUCLEAR EXPLOSIONS), (*PROPAGATION, ELECTROMAGNETIC PULSES), ATMOSPHERE MODELS, WAVE PROPAGATION, ATMOSPHERES, LOW FREQUENCY, VERY LOW FREQUENCY, EXTREMELY LOW FREQUENCY, PHASE, TRANSFORMATIONS(MATHEMATICS), IONOSPHERE, ELECTRON DENSITY

Subject Categories : Nuclear Weapons

Distribution Statement : APPROVED FOR PUBLIC RELEASE