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| Titel |
Estimating the contribution from different ionospheric regions to the TEC response to the solar flares using data from the international GPS network |
| VerfasserIn |
L. A. Leonovich, E. L. Afraimovich, E. B. Romanova, A. V. Taschilin |
| 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 ; 20, no. 12 ; Nr. 20, no. 12, S.1935-1941 |
| Datensatznummer |
250014508
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| Publikation (Nr.) |
 copernicus.org/angeo-20-1935-2002.pdf |
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| Zusammenfassung |
This paper proposes a new
method for estimating the contribution from different ionospheric regions to
the response of total electron content variations to the solar flare, based on
data from the international network of two-frequency multichannel receivers of
the navigation GPS system. The method uses the effect of partial
"shadowing" of the atmosphere by the terrestrial globe. The study of
the solar flare influence on the atmosphere uses GPS stations located near the
boundary of the shadow on the ground in the nightside hemisphere. The beams
between the satellite-borne transmitter and the receiver on the ground for
these stations pass partially through the atmosphere lying in the region of
total shadow, and partially through the illuminated atmosphere. The analysis of
the ionospheric effect of a powerful solar flare of class X5.7/3B that was
recorded on 14 July 2000 (10:24 UT, N22 W07) in quiet geomagnetic conditions (Dst
= -10 nT) has shown that about 75% of the TEC increase corresponds to the
ionospheric region lying below 300 km and about 25% to regions lying above 300
km.
Key words. Ionosphere (solar
radiation and cosmic ray effects; instruments and techniques) – Solar
physics, astrophysics and astronomy (ultraviolet emissions) |
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