Physics
Scientific paper
Sep 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974jatp...36.1443c&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 36, Sept. 1974, p. 1443-1467.
Physics
8
Atmospheric Ionization, Earth Magnetosphere, Radio Transmission, Ray Tracing, Satellite Observation, Very Low Frequencies, Doppler Effect, Electron Density (Concentration), Fr-1 Satellite, Gyrofrequency, Magnetic Field Configurations, Propagation Modes, Radio Transmitters, Spectrum Analysis, Wave Propagation
Scientific paper
The FR-1 experiment is described briefly, and the features of the waves are described in detail. The interpretation based upon ray tracing is developed, showing that the waves become trapped in ducts of enhanced ionization at the base of the protonosphere in the zone near to the transmitter. They are then propagated either up and over and down to the conjugate magnetosphere, or up to the point where ducting is no longer possible with subsequent propagation in the nonducted mode, depending on the L value of the magnetic field line along which the duct is aligned. It is shown that ducted propagation, either total or partial, is the only possible explanation of the observed features of the waves, and the characteristics of the ducts (altitude of the lower end, dimensions) are discussed in the light of them.
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