Auroral kilometric radiation - Time-averaged source location

Details Auroral kilometric radiation - Time-averaged source location Auroral kilometric radiation - Time-averaged source location

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.6501g&link_type=abstract

Journal of Geophysical Research, vol. 84, Nov. 1, 1979, p. 6501-6509.

Physics

14

Atmospheric Electricity, Auroral Zones, Earth Magnetosphere, Electric Fields, Long Wave Radiation, Field Strength, Northern Hemisphere, Power Spectra, Radiation Sources, Satellite Observation, Southern Hemisphere

Scientific paper

In the present paper, the location of the average generation region of auroral kilometric radiation is determined from an analysis of average electric field strengths as a function of spacecraft position in narrow frequency bands centered at 178, 100, and 56.2 kHz. Intense sources of power radiating at kilometric wavelengths are found near 65 degrees invariant latitude in the Northern and Southern Hemispheres, from 22 to 24 hours MLT, and between 2 and 4 earth radii. These dominant sources of power produce the electromagnetic radiation described by Kurth et al. (1975) as auroral kilometric radiation. Each Northern and Southern Hemisphere auroral kilometric radiation source is well confined and emits radiation into solid angles of about 4.1 sr at 178 kHz, 2.2 sr at 100 kHz, and 1.5 sr at 56.2 kHz.

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