Physics
Scientific paper
Jul 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.2764k&link_type=abstract
Journal of Geophysical Research, vol. 80, July 1, 1975, p. 2764-2770.
Physics
29
Auroral Arcs, Low Frequencies, Plasma Waves, Radio Bursts, Radio Direction Finders, Satellite Observation, Antenna Arrays, Electric Fields, Null Zones, Position (Location), Wave Propagation
Scientific paper
Direction-finding measurements with plasma wave experiments on the Hawkeye 1 and Imp 8 satellites are used to locate the source region of auroral kilometric radiation. This radiation has peak intensities between about 100 and 300 kHz and is emitted in intense sporadic bursts lasting for from half an hour to several hours. At peak intensity the total power emitted in this frequency range exceeds 1 billion W. The occurrence of this radiation is known to be closely associated with bright auroral arcs which occur in the local evening auroral regions. Hawkeye 1 provides direction-finding measurements of kilometric radiation from observations at high latitudes over the northern polar regions, and Imp 8 provides similar observations at large radial distances near the equatorial plane. Results from both satellites place the source of the intense auroral kilometric rdiation in the late local evening at about 22.0 hours LT and at a distance of about 0.75 earth radii from the polar axis of the earth.
Baumback Mark M.
Gurnett Donald A.
Kurth Willaim S.
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