NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Near-source and Remote Observations of Kilometric Continuum Radiation from Multispacecraft Observations[I] Kilometric continuum (KC) radiation was first identified from Geotail plasma wave observations. Past authors have shown that this emission has a frequency range that overlaps that of the auroral kilometric radiation (AKR) but is characterized by a fine structure of narrow-bandwidth, linear features that have nearly constant or drifting frequency. This fine structure is distinct from that of AKR. KC also apparently has a distinct source region probably associated with the low-latitude inner magnetosphere, consistent with direction-finding and ray-tracing results. We present new high-resolution electric and magnetic field observations of KC obtained by the Polar plasma wave instrument in the near-source region. These observations show intense electrostatic and less intense electromagnetic emissions near the magnetic equator at the plasmapause. Simultaneously, Geotail, located at 20 to 30 RE in radial distance, observes KC in the same frequency range. These data support a possible mode-conversion source mechanism near a region of high-density gradient. High-resolution data obtained from wideband receivers on board both Polar and Cluster show closely spaced bands of emission near the magnetic equator that may be due to many nearby independent sources of EM emission perhaps associated with density fluctuations or cavities in the plasmasphere.
Document ID
20040016225
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Menietti, J. D.
(Iowa Univ. Iowa City, IA, United States)
Anderson, R. R.
(Iowa Univ. Iowa City, IA, United States)
Pickett, J. S.
(Iowa Univ. Iowa City, IA, United States)
Gurnett, D. A.
(Iowa Univ. Iowa City, IA, United States)
Matsumoto, H.
(Kyoto Univ. Uji, Japan)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Journal of Geophysical Research
Volume: 108
Issue: A11
ISSN: 0148-0227
Subject Category
Astrophysics
Report/Patent Number
Paper-2003JA009826
Funding Number(s)
CONTRACT_GRANT: NAG5-11942
CONTRACT_GRANT: NAG5-11707
CONTRACT_GRANT: NAG5-9561
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available