A comparison of the equatorial spread F derived by the International Reference Ionosphere and the S4 index observed by FORMOSAT-3/COSMIC during the solar minimum period of 2007-2009

NCUIR > College of Earth Sciences > DEPARTMENT OF SPACE SCIENCE AND ENGINEERING > journal & Dissertation > Item 987654321/102093

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Title:	A comparison of the equatorial spread F derived by the International Reference Ionosphere and the S4 index observed by FORMOSAT-3/COSMIC during the solar minimum period of 2007-2009
Authors:	劉正彥;Uma, G.;Liu, J. Y.;Chen, S. P.;Sun, Y. Y.;Brahmanandam, P. S.;Lin, C. H.
Contributors:	地球科學學院太空科學與工程學系
Keywords:	Earth and Environmental Science;Earth Sciences;Geology;Geophysics/Geodesy
Date:	2012-01-01
Issue Date:	2026-04-23 11:02:47 (UTC+8)
Publisher:	Springer International Publishing AG;Berlin/Heidelberg: Springer Berlin Heidelberg
Abstract:	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
Appears in Collections:	[DEPARTMENT OF SPACE SCIENCE AND ENGINEERING] journal & Dissertation

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