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| Titel |
A comparative study of GPS ionospheric scintillations and ionogram spread F over Sanya |
| VerfasserIn |
Y. Zhang, W. Wan, G. Li, L. Liu, L. Hu, B. Ning |
| 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 ; 33, no. 11 ; Nr. 33, no. 11 (2015-11-19), S.1421-1430 |
| Datensatznummer |
250121270
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| Publikation (Nr.) |
 copernicus.org/angeo-33-1421-2015.pdf |
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| Zusammenfassung |
| We analyze the data recorded during December 2011–November 2012 by a digital
ionosonde and a GPS (Global Positioning System) scintillation and (total electron content) TEC receiver collocated at Sanya
(109.6° E, 18.3° N; dip lat. 12.8° N), a low-latitude station in the Chinese longitude sector, to carry out a comparative
study of ionospheric scintillations and spread F. A good consistency between
the temporal variations of GPS scintillation (represented by the S4 index) and
of ionogram spread F (represented by the QF index) is found in the
pre-midnight period
during equinox. However in the post-midnight period during equinox and in
the period from post-sunset to pre-sunrise during June solstice, moderate
spread F is seen without concurrent GPS scintillation. The possible cause
responsible for the difference between post-midnight GPS scintillation and
spread F during equinox could be due to the decaying of 400 m scale
irregularities associated with equatorial spread F. Regarding the
irregularities producing moderate QF and low S4 indices during June
solstice, we suggest that the frequently observed sporadic E (Es) layer and
the medium-scale traveling ionospheric disturbances (MSTIDs) over Sanya
could play important roles in triggering the June solstitial
spread-F events. |
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