Observational evidence of coupling between quasi-periodic echoes and medium scale traveling ionospheric disturbances
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 d...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2007-11-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/25/2185/2007/angeo-25-2185-2007.pdf |
| _version_ | 1818202360626806784 |
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| author | S. Saito M. Yamamoto H. Hashiguchi A. Maegawa A. Saito |
| author_facet | S. Saito M. Yamamoto H. Hashiguchi A. Maegawa A. Saito |
| author_sort | S. Saito |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-12T03:08:13Z |
| format | Article |
| id | doaj.art-1311d0a960be41ef956108f68395e580 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-12T03:08:13Z |
| publishDate | 2007-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-1311d0a960be41ef956108f68395e5802022-12-22T00:40:28ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762007-11-01252185219410.5194/angeo-25-2185-2007Observational evidence of coupling between quasi-periodic echoes and medium scale traveling ionospheric disturbancesS. Saito0M. Yamamoto1H. Hashiguchi2A. Maegawa3A. Saito4National Institute of Information and Communications Technology, Nukui-kita 4-2-1, Koganei, Tokyo 184-8795, JapanResearch Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto 611-0011, JapanResearch Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto 611-0011, JapanResearch Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto 611-0011, JapanDepartment of Geophysics, Faculty of Science, Kyoto University, JapanWe 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.https://www.ann-geophys.net/25/2185/2007/angeo-25-2185-2007.pdf |
| spellingShingle | S. Saito M. Yamamoto H. Hashiguchi A. Maegawa A. Saito Observational evidence of coupling between quasi-periodic echoes and medium scale traveling ionospheric disturbances Annales Geophysicae |
| title | Observational evidence of coupling between quasi-periodic echoes and medium scale traveling ionospheric disturbances |
| title_full | Observational evidence of coupling between quasi-periodic echoes and medium scale traveling ionospheric disturbances |
| title_fullStr | Observational evidence of coupling between quasi-periodic echoes and medium scale traveling ionospheric disturbances |
| title_full_unstemmed | Observational evidence of coupling between quasi-periodic echoes and medium scale traveling ionospheric disturbances |
| title_short | Observational evidence of coupling between quasi-periodic echoes and medium scale traveling ionospheric disturbances |
| title_sort | observational evidence of coupling between quasi periodic echoes and medium scale traveling ionospheric disturbances |
| url | https://www.ann-geophys.net/25/2185/2007/angeo-25-2185-2007.pdf |
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