Effect of the lower ionosphere on the propagation of waves from an ELF/VLF source in the magnetosphere
Abstract
A modified form of the Smith-Pitteway full-wave program is used, in conjunction with various lower ionospheric profiles, to calculate the propagation characteristics of ELF/VLF waves from a source in the magnetosphere. Expressions are developed which give the ratio of the power transmitted into the earth's surface to the power incident on the ionosphere as a function of the number of wave hops in the earth-ionosphere waveguide. The wave polarization after each hop is obtained showing a limiting polarization after several hops. Numerical evaluation of these expressions are presented and discussed.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- April 1975
- Bibcode:
- 1975STIN...7532292D
- Keywords:
-
- Earth Magnetosphere;
- Extremely Low Frequencies;
- Lower Ionosphere;
- Very Low Frequencies;
- Wave Propagation;
- Numerical Analysis;
- Polarization (Waves);
- Radio Waves;
- Wave Reflection;
- Communications and Radar