Accession Number : AD0755391

Title :   Propagation and Resonance Parameters of the Earth-Ionosphere Cavity - Spherical Versus Planar Stratification of the Ionosphere.

Descriptive Note : Final rept. (Part 2) 16 Nov 69-15 Nov 72,

Corporate Author : RHODE ISLAND UNIV KINGSTON DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Tran,Anh ; Polk,Charles

Report Date : 15 NOV 1972

Pagination or Media Count : 63

Abstract : In treating ELF wave propagation in the Earth-Ionosphere cavity, the flat earth approximation may be derived from the exact equations for the spherical cavity by introducing a second order or Debye approximation for the spherical Hankel functions. In the frequency range 3 to 30 Hz, however, the assumed conditions for the Debye approximation are not satisfied. For this reason an exact evaluation of the spherical Hankel functions is used to study the effects of the flat earth approximation on various propagation and resonance parameters. (Author)

Descriptors :   (*RADIO TRANSMISSION, EXTREMELY LOW FREQUENCY), IONOSPHERE, ATTENUATION, NUMERICAL ANALYSIS, SPECIAL FUNCTIONS(MATHEMATICAL), RESONANCE, IONOSPHERIC PROPAGATION

Subject Categories : Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE