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Frequency Dependence of VLF Fading at Sunrise
Author(s) -
Steele F. K.,
Crombie D. D.
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/rds196726547
Subject(s) - sunrise , amplitude , fading , attenuation , physics , phase (matter) , range (aeronautics) , computational physics , very low frequency , sunset , interference (communication) , optics , telecommunications , mathematics , statistics , materials science , astronomy , decoding methods , channel (broadcasting) , quantum mechanics , computer science , composite material
The sunrise variations of phase and amplitude of VLF signals received over a single long path, at frequencies between 9.2 and 26.1 kHz are interpreted as interference between waveguide modes. The deduced differences in phase velocity and attenuation rates of the first two modes are in accordance with theoretical calculations and with earlier observations in a more restricted frequency range.