THE TEC VARIATIONS DURING SUDDEN MAGNETIC STORM IN WUHAN
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摘要: 利用1980年4月至1990年12月共136次急始型磁暴资料统计研究了武昌地区TEC的变化。结果表明,TEC的暴时变化出现正相,相对变化值△TEC的暴时变化形态与中高纬地区一些台站所观测到的结果差别较大;如果磁暴急始出现在白天,则急始后36小时,会出现△TEC的极大值,如果急始出现在夜间,则不会出现极大值,这一现象与太阳黑子数,季节无关。Abstract: In this paper, 136 sets of Faraday rotation data obtained by observation of Japanese Geostationary satellite ETS--Ⅱ radio beacon during April 1980 to December 1990 at Wuhan are analysed to study the response of TEC to SC Geomagnetic storm. It was found that TEC generally enhances during geomagnetic storm. The behavior of △TEC shows much disparity from that observed at mid--and high--latitude. Another interesting fact was that if SC starts in daytime, △TEC will get maximum 36 hours later. Otherwise, no maximum of △TEC appears. This fact exists all the time regardless of sunspot number or season.
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Key words:
- TEC /
- Ionospheric storm /
- Geomagnetic storm
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