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An Evaluation of VLF Daytime Propagation Parameters Using a Multi-Frequency Sounder
NAVAL WEAPONS CENTER CORONA LABS CA CORONA United States
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An oblique incidence VLF ionospheric sounder system gives a means of obtaining multi-frequency amplitude and phase measurements in the VLF band simultaneously at up to 10 frequencies over a single propagation path. The analysis presented in this report is an attempt 1 to determine the degree of correlation obtainable between experimental sounder data and predicted results from existing theoretical models for VLF propagation, 2 to determine the variability of propagation parameters derived from the experimental data, and 3 to compare theoretical model parameters which best describe experimental results with previously published findings.
APPROVED FOR PUBLIC RELEASE