Accession Number:

AD0260064

Title:

NON-LOCAL ELECTRODYNAMICAL MODEL FOR EXTREMELY LOW FREQUENCY PROPAGATION IN THE UPPER IONOSPHERE

Descriptive Note:

Corporate Author:

SYLVANIA ELECTRIC PRODUCTS INC WALTHAM MASS

Report Date:

1961-03-14

Pagination or Media Count:

1.0

Abstract:

A linear non-local electrodynamical model for low frequency electromagnetic propagation in the upper ionosphere is presented. Particle kinetics are treated by means of a Boltzmannlike equation for the velocity distributions. Close collisions of charged particles with neutral molecules in the slightly ionized atmospher are treated by means of Fokker-Planck operators with separate collision frequencies and diffusion coefficients for each species of the plasma. The particle kinetics are eliminated from the coupled Maxwell-Boltzmann equations including a constant magnetic field and the resulting electrodynamical equations are studied by transform methods. Dispersion relations for small amplitude plane-wave solutions in the infinite homogeneous equilibrium system are analyzed for the VLF and ELF frequency ranges in the ionosphere. Excitation problems for localized impulse sources are treated in various temperature ranges and for special magnetic field conditions. The general analytic properties of the non-local dielectric functions are studied at finite temperatures by a general spectral form method. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE