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| Titel |
Mid-latitude ionospheric scintillation anomaly in the Far East |
| VerfasserIn |
L. A. Hajkowicz, H. Minakoshi |
| 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 ; 21, no. 2 ; Nr. 21, no. 2, S.577-581 |
| Datensatznummer |
250014575
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| Publikation (Nr.) |
 copernicus.org/angeo-21-577-2003.pdf |
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| Zusammenfassung |
A long-term (over 3
years) study has been undertaken to obtain a comprehensive evaluation of VHF
ionospheric scintillation morphology in East Asia (at Kokobunji in Japan),
using amplitude records from Transit satellites. It is now evident that summer
day and night scintillation enhancement in this mid-latitude region is a
long-term evidence of a well-known Asian ionospheric disturbance anomaly. The
scintillation activity is particularly strong during summer nights (21:00–24:00
LT) and on occasion, all satellite passes recorded on consecutive days are
associated with pronounced scintillation activity. A second sub-maximum is
observed in the summer pre-noon period (09:00–12:00 LT). The scintillation
regions extend latitudinally for a distance of 400–600 km in the F-region and
100–200 km in the E-region, mostly equatorwards of Kokobunji. For comparison
similar scintillation data obtained for one year at the same longitudinal
sector but in southern mid-latitudes (Brisbane in Australia) were compared with
the simultaneous northern scintillation data. The scintillation activity at
Brisbane was much less pronounced in the southern summer but was of the same
low level during other seasons as that for Kokobunji. This consistent
scintillation anomaly, as yet, has not been included in the global
scintillation models, which are essential for radio-satellite communications.
Key words. Ionosphere (mid-latitude
ionosphere; ionospheric irregularities) |
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