Physics
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.1817p&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 93, March 1, 1988, p. 1817-1838.
Physics
12
Earth Magnetosphere, Satellite Observation, Vlf Emission Recorders, Whistlers, Gyrofrequency, Magnetospheric Instability, Plasmapause
Scientific paper
A new type of discrete whistler mode emission has been observed in the magnetosphere at L below 4. The emission elements are confined to a bandwidth of 1-5 kHz, with the lower cutoff frequency of the band varying with L shell, being equal to about 0.2-0.5 f(Heq), where f(Heq) is the equatorial electron gyrofrequency. The discrete and burstlike nature of the emissions is similar to that of chorus emissions typically observed at higher L; however, dispersion of individual elements is often different from typical chorus, and the emissions are observed inside as well as outside the plasmapause. The phenomenon seems to occur mainly in the early morning local time sector and is well correlated with geomagnetic activity, occurring mostly at high gasmagnetic activity. The analysis of data from the low-altitude ISIS-2 and the high-altitude De-1 satellites indictes that the emissions may be generated near the equatorial plane at frequencies of about 0.2 f(Heq) inside and about 0.35 f(Heq) outside the plasmapause. The parallel energy of electrons for gyroresonance with the observed waves is found to be about 20-50 keV in both cases.
Inan Umran S.
Poulsen William L.
No associations
LandOfFree
Satellite observations of a new type of discrete VLF emission at L below 4 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Satellite observations of a new type of discrete VLF emission at L below 4, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Satellite observations of a new type of discrete VLF emission at L below 4 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1674943