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| Titel |
LHR band emissions at mid-latitude and their relationship to ionospheric ELF hiss and relativistic electrons |
| VerfasserIn |
A. Morioka, H. Oya, T. Obara, Y. S. Miyoshi, K. Nagata, K.-I. Oyama, T. Abe |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 23, no. 3 ; Nr. 23, no. 3 (2005-03-30), S.723-732 |
| Datensatznummer |
250015174
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| Publikation (Nr.) |
 copernicus.org/angeo-23-723-2005.pdf |
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| Zusammenfassung |
| LHR band emissions observed at mid-latitude were investigated using data
from the EXOS-C (Ohzora) satellite. A typical feature of the LHR band
emissions is a continuous banded structure without burst-like and cut-off
features whose center frequency decreases as the satellite moves to higher
latitudes. A statistical analysis of the occurrence characteristics of the
phenomena showed that mid-latitude LHR emissions are distributed inside the
plasmapause during magnetically quiet periods, and the poleward boundary of
the emission region moves to lower latitudes as the magnetic activity
increases. The altitude distribution of the waves suggests that the propagation
in the LHR duct formed horizontally in the mid-latitude upper-ionosphere.
The emission is closely related to the occurrence of ionospheric ELF hiss.
It is also shown that LHR emissions are commonly observed in the slot region
of the radiation belt, and they sometimes accompany the enhancement of the
ionospheric electron temperature. The generation of the LHR band emissions
is discussed based on the observed characteristics. |
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