Accession Number : AD0725147

Title :   Numerical Results for VLF Mode Conversion in the Earth-Ionosphere Waveguide.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL ELECTRONICS LAB CENTER SAN DIEGO CALIF

Personal Author(s) : Pappert,Richard A. ; Smith,Robert R. ; Shockey,Linda R.

Report Date : 12 APR 1971

Pagination or Media Count : 41

Abstract : Numerical results are presented for several mode conversion models which allow for the inhomogeneity and anisotropy of the ionosphere. It is concluded that reflections associated with propagation across the terminator do not significantly affect mode conversion. It is shown that significant departure between mode conversion and WKB mode sums can occur when propagating across the terminator even for transition thicknesses as great as 1000 km. Numerical results are compared with the experimental modeling results of the American Nucleonics Corporation. (Author)

Descriptors :   (*IONOSPHERIC PROPAGATION, VERY LOW FREQUENCY), MATHEMATICAL MODELS, REFLECTION

Subject Categories : Atmospheric Physics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE