Accession Number : AD0829842

Title :   AN EVALUATION OF VLF DAYTIME PROPAGATION PARAMETERS USING A MULTI-FREQUENCY SOUNDER,

Corporate Author : NAVAL WEAPONS CENTER CORONA LABS CA

Personal Author(s) : Hildebrand, Verne E. ; Morfitt, David G.

Report Date : MAR 1968

Pagination or Media Count : 71

Abstract : 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. (Author)

Descriptors :   (*IONOSPHERIC PROPAGATION, VERY LOW FREQUENCY), DIURNAL VARIATIONS, ATMOSPHERIC SOUNDING, ELECTRON DENSITY, PHASE(ELECTRONICS), EXPERIMENTAL DATA, CORRELATION TECHNIQUES, THEORY, MATHEMATICAL MODELS, PROPAGATION.

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE