Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2010, Vol. 7, No. 1, pp. 173-189
Tropical cyclone influence on the higher ionosphere from tomography sounding data over Sakhalin island
L.B. Vanina-Dart
1, А.А. Romanov
2, Е. А. Sharkov
11 Space Research Institute RAN, 117997 Moscow, 84/32 Profsoyuznaya str
2 FGUP " The Russian scientific research institute of
Space instrument making ", 111250, Москва, ул. Авиамоторная
In this paper tomography sounding data taken in November 2007 is considered for following 3 points: Uzhnosahalinsk (46 ° 57 ′ 0 ″ N, 142 ° 44 ′ 0 ″ E), Poronajsk (49 ° 13 ′ 0 ″ N, 143 ° 6 ′ 0 ″ E) and Nogliki (51 ° 49 ′ 0 ″ N, 143 ° 7 ′ 0 ″ E). The aim of this research is to find the possible influence of tropical cyclone TC on the higher ionosphere. The results demonstrate that values for critical frequency of F2- layer (as measured at approximately 3000 km from the TC centre in a horizontal plane in a longitudinal direction) fall after several days. Also the foF2 values increased over 1 or 2 day period near the TC active zone (in a longitudinal direction). Complexities of the morphological analysis of the given phenomenon consist that ТЦ is «широкополостным» (in a longitudinal direction, in much smaller degree in a horizontal direction) and a long-term source of indignation. A major difficulty posed to our study is that the TC is wide-spread and long-lived.
Keywords: layers interaction, ionosphere, tropical cyclone, tomography sounding, critical frequency of F2-layer
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