Physics
Scientific paper
Dec 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jatp...39.1277b&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 39, Nov.-Dec. 1977, p. 1277-1292.
Physics
3
Extremely Low Radio Frequencies, Ionospheric Propagation, Long Wave Radiation, Propagation Modes, Transmission Lines, D Region, E Region, Plane Waves, Polarization (Waves), Radio Echoes, Transmission Efficiency, Waveguides
Scientific paper
ELF-band propagation in the earth-ionosphere transmission line is studied, and a method is derived for ascertaining at what level the ionosphere may be cut off at the bottom and replaced by a discontinuity. The height of ELF reflection as determined by the method is dependent on frequency but not on angle incidence. The rate of attenuation in the earth-ionosphere transmission line caused by energy leakage into the ionosphere above the level of reflection is also analyzed. The mode transmission problem in the earth-ionosphere transmission line involves four crossing plane waves, one pair upgoing and the other pair downgoing.
Booker Henry G.
Lefeuvre François
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