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VLF Transmission Loss Calculated From Spectral Analyses of Atmospherics
Author(s) -
Taylor W. L.
Publication year - 1967
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1002/rds196722139
Subject(s) - atmospherics , attenuation , transmission loss , path loss , transmission (telecommunications) , remote sensing , physics , very low frequency , environmental science , spectral line , acoustics , meteorology , optics , computational physics , geodesy , telecommunications , geology , computer science , astronomy , wireless
VLF atmospheric data recorded during four 6‐hour periods was analyzed to evaluate the feasibility of employing a new technique to determine attenuation rates over a particular path. The technique involves recording the spectral components of atmospherics arriving from within an adjustable azimuthal direction. Changes in transmission loss, deduced from the observed spectra, between day and night conditions for an approximate 3000‐km path indicate differences in total transmission loss of about 15 dB at 5 kHz, 1 or 2 dB at 10 kHz and 40 kHz, and a negative loss, or gam, between 12kHz and 30kHz.