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Electromagnetic plasma wave emissions from the auroral field lines

Author
Gurnett, D. A.
Published
Sep 1, 1977.
Physical Description
1 electronic document
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
The most important types of auroral radio emissions are reviewed, both from a historical perspective as well as considering the latest results. Particular emphasis is placed on four types of electromagnetic emissions which are directly associated with the plasma on the auroral field lines. These emissions are (1) auroral hiss, (2) saucers, (3) ELF noise bands, and (4) auroral kilometric radiation. Ray tracing and radio direction finding measurements indicate that both the auroral hiss and auroral kilometric radiation are generated along the auroral field lines relatively close to the earth, at radial distances from about 2.5 to 5 R sub e. For the auroral hiss the favored mechanism appears to be amplified Cerenkov radiation. For the auroral kilometric radiation several mechanisms have been proposed, usually involving the intermediate generation of electrostatic waves by the precipitating electrons.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19770026443.
Accession ID: 77N33387.
NASA-CR-155172.
U-OF-IOWA-77-36.
Gen. Sci. Assembly of the Intern. Assoc. of Geomagnetism and Aeronomy; 1977; Seattle.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15731063