Effects of geomagnetic storm on GPS ionospheric scintillations at Sanya

Guozhu Li, Baiqi Ning, Biqiang Zhao, Libo Liu, J. Y. Liu, K. Yumoto

研究成果: 雜誌貢獻期刊論文同行評審

50 引文 斯高帕斯(Scopus)

摘要

The effects of geomagnetic storm on GPS ionospheric scintillations are studied here using GPS scintillation data recorded at Sanya (18.3°N, 109.5°E; geomagnetic: 7.6°N, 180.8°E), the southmost station in the Chinese longitude region. GPS scintillation/TEC and DMSP data are utilized to show the development of irregularities during the period year 2005 (solar minimum). Statistical analysis of K planetary index (Kp) and amplitude scintillation index (S4) indicates that most storms of the year did not trigger the scintillation occurrence at Sanya. However, cases of scintillation occurring during moderate and strong storm (Dst<-100) periods show clearly that the development of irregularities producing scintillations can be triggered by geomagnetic storms during the low scintillation occurrence season. The effects (trigger or not trigger/inhibit) depend on the maximum dDst/dt determined local time sector, and can be explained by the response of the equatorial vertical drift velocities to magnetospheric and ionospheric disturbance electric fields. For station Sanya, the maximum dDst/dt determined local time is near the noon (or post-midnight) sector for most storms of the year 2005, which inhibited (or did not trigger) the post-sunset (or post-midnight) scintillation occurrence and then led to the phenomena that the statistical results presented.

原文???core.languages.en_GB???
頁(從 - 到)1034-1045
頁數12
期刊Journal of Atmospheric and Solar-Terrestrial Physics
70
發行號7
DOIs
出版狀態已出版 - 5月 2008

指紋

深入研究「Effects of geomagnetic storm on GPS ionospheric scintillations at Sanya」主題。共同形成了獨特的指紋。

引用此