Statistics – Applications
Scientific paper
Feb 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975georl...2...52b&link_type=abstract
Geophysical Research Letters, vol. 2, Feb. 1975, p. 52-55.
Statistics
Applications
6
Atmospheric Radiation, Earth Magnetosphere, Long Wave Radiation, Plasma Oscillations, Radiation Sources, Satellite Observation, Electron Plasma, Electron Precipitation, Electrostatic Waves, Low Frequencies, Plasma Turbulence, Polar Regions, Propagation Modes
Scientific paper
The intense electromagnetic radiation of near earth origin, observed by the OGO, IMP, and Hawkeye satellites, can be explained in terms of plasma oscillations near the upper hybrid frequency which are stimulated in the high latitude regions at distances within 5 earth radii. The wave energy is converted from the longitudinal electrostatic mode to the transverse electromagnetic mode as it travels in the slightly inhomogeneous magnetosphere, and it is reflected at the point where the wave frequency equals the local electron plasma frequency. Peak emission region occurs near 2 earth radii. The original plasma oscillations are generated in the turbulent plasma produced by precipitating electrons associated with discrete auroral arcs. The mechanism has possible applications to studies of the irregular structure of the magnetospheric thermal plasma and to models for the decametric radiation from Jupiter.
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