Springer International Publishing AG;Berlin/Heidelberg: Springer Berlin Heidelberg
摘要:
摘要： The latest version of the International Reference Ionosphere (IRI-2007) model includes an option for spread- F occurrence prediction for the first-time. The IRI-2007 spread- F occurrence is a function of solar 10.7 cm radiation flux, F 10.7 . In this paper, an attempt is made to cross-examine the spread- F occurrence derived by the IRI-2007 and the ionospheric scintillations in terms of the maximum value of the S 4 index ( S 4max ) between 150–350-km altitudes, calculated from fluctuations of the signal-to-noise ratio (SNR) intensity in the L1 channel of GPS radio occultation signals using FORMOSAT-3/COSMIC (F3/C) satellites during the low solar activity years 2007–2009. It is found that S 4max maintains a fairly good consistency with spread- F occurrence simulated by IRI-2007 in the Brazilian region. Thus, the global S 4 index statistics can be considered as a viable source of database to be incorporated into the global IRI spread- F prediction scheme owing to fact that the F3/C satellites can provide an unprecedented global database including the S 4 index. 其他題名： Earth Planet Sp 出版者： Berlin/Heidelberg: Springer Berlin Heidelberg 出版日期： 2012-01-01 出處： Earth, planets, and space, 2012-01, Vol.64 (6), p.467-471 資源來源： Publicly available content database 版權： The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences; TERRAPUB. 2012 識別號： EISSN: 1880-5981 識別號： DOI: 10.5047/eps.2011.10.014
