Propagation of extremely low-frequency /ELF/ atmospherics over a mixed day-night path

Details Propagation of extremely low-frequency /ELF/ atmospherics over a mixed day-night path Propagation of extremely low-frequency /ELF/ atmospherics over a mixed day-night path

Oct 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974jatp...36.1643h&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 36, Oct. 1974, p. 1643-1661.

Physics

3

Atmospheric Attenuation, Atmospherics, Extremely Low Radio Frequencies, Ionospheric Propagation, Phase Velocity, Radio Transmission, Diurnal Variations, Frequency Response, Ground Stations, Lightning, Radio Attenuation

Scientific paper

Description of an attempt to evaluate experimentally the averaging of propagation parameters by ELF waves propagating over a path in which the ionospheric environment changes within one wavelength. The results indicate that a simple weighted average of the day and night phase velocities is a valid description of measured phase velocities across the day-night transition. Less agreement was obtained between the measured propagation loss across the transition region and that predicted from a simple day-night weighted average of wave attenuation rates.

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