Accession Number : AD0743948

Title :   Mode Conversion Program for an Inhomogeneous Anisotropic Ionosphere.

Descriptive Note : Interim rept., Jun 71-Apr 72,

Corporate Author : NAVAL ELECTRONICS LAB CENTER SAN DIEGO CALIF

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

Report Date : 01 MAY 1972

Pagination or Media Count : 69

Abstract : The report presents a program for numerically determining mode conversion coefficients and mode sums for a waveguide which is inhomogeneous along the direction of propagation. The program allows for vertical inhomogeneity of the ionosphere as well as its anisotropy due to the geomagnetic field. The model assumes the perturbation has no horizontal space dependence perpendicular to the transmitter receiver line. Mode conversion coefficients are obtained by ignoring reflections associated with the inhomogeneity along the direction of propagation. The latter assumption greatly simplifies the calculations and appears to be justified for a broad class of horizontal inhomogeneities. However, its validity under severe artificial ionospheric disturbances requires further study. (Author)

Descriptors :   (*IONOSPHERIC PROPAGATION, NUMERICAL ANALYSIS), COMPUTER PROGRAMS, VERY LOW FREQUENCY, ELECTRON DENSITY, GEOMAGNETISM, MAGNETIC FIELDS, ELECTRIC FIELDS, WAVEGUIDES

Subject Categories : Atmospheric Physics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE