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| Titel |
Observational evidence of coupling between quasi-periodic echoes and medium scale traveling ionospheric disturbances |
| VerfasserIn |
S. Saito, M. Yamamoto, H. Hashiguchi, A. Maegawa, A. Saito |
| 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 ; 25, no. 10 ; Nr. 25, no. 10 (2007-11-06), S.2185-2194 |
| Datensatznummer |
250015933
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| Publikation (Nr.) |
 copernicus.org/angeo-25-2185-2007.pdf |
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| Zusammenfassung |
| We have found that
quasi-periodic (QP) echoes in the E region were well defined
when medium scale traveling ionospheric disturbances (MSTIDs)
in the F region were present.
The appearance and disappearance of the MSTIDs observed with the dense
GPS receiver network are well correlated
with the development and decay of QP echoes observed with
the Middle-and-Upper atmosphere (MU) radar.
Interferometric imaging of the QP echoes obtained using the
MU radar shows that bands of echoing regions aligned
northwest to southeast
drift southwestward, and their wavefront and propagation direction are
the same as those of MSTIDs.
This result confirms the expectation of Hysell
et al. (2002) who
observed band structures in QP echoes by using the MU radar and
suggested their relation to MSTIDs.
We found observational evidence that the midlatitude E- and F regions
are coupled through the geomagnetic field line,
although we could not clearly ascertain which of the two regions is the source. |
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