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| Titel |
Climatology of the ionospheric slab thickness along the longitude of 120° E in China and its adjacent region during the solar minimum years of 2007–2009 |
| VerfasserIn |
Z. Huang, H. Yuan |
| 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. 10 ; Nr. 33, no. 10 (2015-10-30), S.1311-1319 |
| Datensatznummer |
250121261
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| Publikation (Nr.) |
 copernicus.org/angeo-33-1311-2015.pdf |
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| Zusammenfassung |
| The ionospheric slab thickness is defined as the ratio of
the total electron content (TEC) to the ionospheric F2 layer peak electron
density (NmF2). In this study, the slab thickness is determined by measuring
the ionospheric TEC from dual-frequency Global Positioning System (GPS) data and
the NmF2 from the Constellation Observing System for Meteorology, Ionosphere
and Climate (COSMIC). A statistical analysis of the diurnal, seasonal and
spatial variation in the ionospheric slab thickness is presented along the
longitude of 120° E in China and its adjacent region during the
recent solar minimum phase (2007–2009). The diurnal ratio,
defined as the maximum slab thickness to the minimum slab thickness, and the
night-to-day ratio, defined as the slab thickness during daytime to the slab
thickness during night-time, are both analysed. The results show that the
TEC of the northern crest is greater in winter than in summer, whereas NmF2
is greater in summer than in winter. A pronounced peak of slab thickness
occurs during the post-midnight (00:00–04:00 LT) period, when the
peak electron density is at the lowest level. A large diurnal ratio exists
at the equatorial ionization anomaly, and a large night-to-day ratio occurs
near the equatorial latitudes and mid- to high latitudes. It is found that the
behaviours of the slab thickness and the F2 peak altitude are well
correlated at the latitudes of 30–50° N and during the period of 10:00–16:00 LT. This current
study is useful for improvement of the regional model and accurate
calculation of the signal delay of radio waves propagating through the
ionosphere. |
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