Propagation characteristics of dayside low-altitude hiss: Case studies

Journal Article · Wed Jul 01 04:00:00 EDT 1992 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/91JA02929· OSTI ID:7262121

Lefeuvre, F; Rauch, J L; Lagoutte, D; Berthelier, J J; Cerisier, J C ^[1]

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1. Centre National de la Recherche Scientifique, Saint Maur-des-Fosses (France)

A comprehensive set of wave analysis techniques is applied to dayside ELF hiss observed over three typical orbits of the low-altitude AUREOL 3 satellite. Validity domains are established for each technique, whose results indicate the following propagation characteristics. Within the plasmasphere the waves are narrow-band, have a lower cutoff frequency close to the local proton gyrofrequency f{sub H+}, and propagate downward with very oblique k vectors directed toward lower L values. Left-hand mode wave are detected just below f{sup H+}. Within the plasmapause gradient the waves are broad-band, have a lower cutoff frequency at the vicinity of f{sub H+}, and propagate mainly upward with oblique k vectors directed toward lower L values. Within the light-ion trough region and the auroral zones the waves are broad-band, have lower cutoff frequencies that can be below the local f{sub H+}, and propagate downward with k vectors along B{sub 0}. Narrow-band emissions detected in the vicinity of the cusp propagate upward. Exceptions are found at frequencies just above f{sub H+} where, at nearly all invariant latitudes, waves are commonly upgoing. The authors conclude that (1) altitudes and (2) the large density gradients that characterize the plasmapause and the cusp seem to act as traps for waves reflected below the satellite.

• OSTI ID: 7262121
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 97:A7; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AURORAL HISS
CRITICAL FREQUENCY
DATA ANALYSIS
DIMENSIONS
EARTH ATMOSPHERE
EARTH MAGNETOSPHERE
ELECTROMAGNETIC RADIATION
GEOGRAPHICAL VARIATIONS
HEIGHT
INTERACTIONS
LATITUDE EFFECT
PLASMA DENSITY
PLASMASPHERE
RADIATIONS
REFLECTION
SATELLITES
VARIATIONS
WAVE PROPAGATION