 |
| Titel |
A theoretical verification of intensity of plasmaspheric ELF hiss emissions: theory versus GEOS-1 observations |
| VerfasserIn |
R. Prakash, R. P. Singh, R. C. Awasthi, D. P. Singh |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 15, no. 6 ; Nr. 15, no. 6, S.597-602 |
| Datensatznummer |
250012819
|
| Publikation (Nr.) |
 copernicus.org/angeo-15-597-1997.pdf |
|
|
|
|
|
| Zusammenfassung |
| An attempt is made to confirm the generation
mechanism of plasmaspheric ELF hiss emissions observed aboard GEOS-1 satellite
in the equatorial region both at small and large wave normal angles by
calculating their magnetic field intensities in terms of incoherent Cerenkov
radiation mechanism and cyclotron resonance instability mechanism, using
appropriate and suitable plasma parameters. The ELF intensities calculated by
Cerenkov radiation mechanism, being 4 to 5 orders of magnitude lower than the
observed intensities, rule out the possibility of their generation by this
mechanism. On the other hand, the intensities calculated under electron
cyclotron resonance instability mechanism are found to be large enough to
account for both the observed intensity and propagation losses and hence to
confirm that plasmaspheric ELF hiss emissions observed aboard GEOS-1 satellite
both at small and large wave normal angles were originally generated in the
equatorial region by this mechanism just near the inner edge of the plasmapause.
The difference in the observed intensities of two types of the emissions has
been attributed to the propagation effect rather than the generation effect. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|