Physics
Scientific paper
Mar 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976tkrs.rept.....a&link_type=abstract
Unknown
Physics
Explorer 2 Satellite, Lunar Occultation, Satellite Observation, Terrestrial Radiation, Earth Magnetosphere, Electron Precipitation, Magnetic Field Configurations, Magnetosheath, Night Sky, Plasmas (Physics), Solar Wind
Scientific paper
Observations are presented of lunar occultations of the earth at 250 kHz obtained with the Radio-Astronomy-Explorer-2 satellite which were used to derive two dimensional maps of the location of the sources of terrestrial kilometric radiation (TKR). By examining the two dimensional source distributions as a function of the observer's location (lunar orbit) with respect to the magnetosphere, the average three dimensional location of the emission regions can be estimated. Although TKR events at 250 kHz can often be observed at projected distances corresponding to the 250 kHz electron gyro or plasma level (approximately 2 earth radii), many events are observed much farther from the earth (between 5 and 15 earth radii). Dayside emission apparently in the region of the polar cusp and the magnetosheath and night emission associated with regions of the magnetotail are examined. The nightside emission is suggestive of a mechanism involving plasma sheet electron precipitation in the pre-midnight sector.
Alexander Joseph K.
Kaiser Michael L.
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