NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Effect of parallel refraction on magnetospheric upper hybrid wavesLarge amplitude (not less than 10 mV/m) electrostatic plasma waves near the upper hybrid (UH) frequency have been observed from 0 to 50 deg magnetic latitude (MLAT) during satellite plasma-pause crossings. A three-dimensional numerical ray-tracing calculation, based on an electron distribution measured during a GEOS 1 dayside intense upper-hybrid wave event, suggests how UH waves might achieve such large amplitudes away from the geomagnetic equator. Refractive effects largely control the wave amplification and, in particular, the unavoidable refraction due to parallel geomagnetic field gradients restricts growth to levels below those observed. However, a cold electron density gradient parallel to the field can lead to upper hybrid wave growth that can account for the observed emission levels.
Document ID
19840065445
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Engel, J.
(Bell Technical Operations Corp., Tucson, AZ; California, University Los Angeles, CA, United States)
Kennel, C. F.
(California, University Los Angeles, CA, United States)
Date Acquired
August 12, 2013
Publication Date
September 1, 1984
Publication Information
Publication: Geophysical Research Letters
Volume: 11
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
84A48232
Funding Number(s)
CONTRACT_GRANT: NGL-05-007-190
CONTRACT_GRANT: NSF ATM-81-19544
Distribution Limits
Public
Copyright
Other

Available Downloads

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