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ZHANG Hongping ZHU Wenyao PENG Junhuan & HUANG Cheng . Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai China . Graduate School of the Chinese Academy of Sciences Beijing China . Key Laboratory of Advanced Engineering Survey of SBSM Tongji University Shanghai China 《科学通报(英文版)》2005,50(13):1373-1381
The periodic solar activities strongly affect the ioniza-tion of the ionosphere. Sudden enhancements in soft and hard solar X-ray and EUV radiation during solar flare can produce an immediate increase in ionospheric ionization in various degrees at different heights; altogether, they are called sudden ionospheric disturbances (SIDs), which are generally recorded as sudden increase of total electron content (SITEC), the short wave fadeout (SWF), sudden frequency deviation (SFD), sudden ph… 相似文献
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