Determination of Effective Ionospheric Electron Density Profiles for VLF/LF Propagation at Midlatitudes.
DEFENSE COMMUNICATIONS AGENCY ARLINGTON VA
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The report presents experimental data derived from field strengths of VLFLF signals between 9 and 56 kHz measured on several mid-latitude paths. Comparisons between experimental data and theoretical predications are shown for several flights, both in daytime and in nighttime, over the path from Hawaii to southern California. The comparisons show that an essentially constant exponential electron density profile describes the data for all the frequencies in the above range for daytime whereas at night, the best fit exponential profile gradient increases with frequency.
- Atmospheric Physics
- Radiofrequency Wave Propagation
- Radio Communications