Phase and amplitude variations of 40-kHz radio waves propagating over a 7.1-Mm path

Crouchley J. and Rahmani Z. (1973) Phase and amplitude variations of 40-kHz radio waves propagating over a 7.1-Mm path. Journal of Atmospheric and Terrestrial Physics, 35 3: 479-495. doi:10.1016/0021-9169(73)90038-X


Author Crouchley J.
Rahmani Z.
Title Phase and amplitude variations of 40-kHz radio waves propagating over a 7.1-Mm path
Journal name Journal of Atmospheric and Terrestrial Physics
ISSN 0021-9169
Publication date 1973-01-01
Sub-type Article (original research)
DOI 10.1016/0021-9169(73)90038-X
Volume 35
Issue 3
Start page 479
End page 495
Total pages 17
Subject 1902 Film, Television and Digital Media
1908 Geophysics
Abstract A report is given of the significant features of radio propagation at a frequency of 40 kHz over a 7.1-Mm path in an approximately N-S direction. An average diurnal phase shift of 810° and day-to-night amplitude increase of 12 dB are observed. Numerical values of wavehop and waveguide mode parameters are presented and used to discuss the complex phenomena occurring during sunrise and sunset. Mode 2 is usually dominant but 1 and 3 are not insignificant. It is postulated that mode conversion at the terminator, leads to mode 1 being dominant during parts of some sunrise transitions. The diurnal phase shift exhibits a minimum value about May as would be expected if X-radiation from Scorpio XR1 were influencing night-time electron densities in the lower E-region of the ionosphere.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 28 Jun 2016, 17:35:10 EST by System User