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标题：Atmospheric drag effects on the KOMPSAT-1 satellite during geomagnetic superstorms
其他标题：Atmospheric drag effects on the KOMPSAT-1 satellite during geomagnetic superstorms
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作者：K.-H. Kim ; Y.-J. Moon ; K.-S. Cho 等
期刊名称：Earth, Planets and Space
电子版ISSN：1880-5981
出版年度：2006
卷号：58
期号：6
页码：e25-e28
DOI：10.1186/BF03351968
出版社：Springer Verlag
摘要：We examine the atmospheric drag on the low earth-orbiting satellite, KOMPSAT-1 in a sun-synchronous orbit at ~685-km altitude starting in 1999, during a 3-month (October-December) period in 2003. This 3-month interval includes the October 29-30 and November 20 magnetic superstorms and weak to moderate storms. We observed that the daily KOMPSAT-1 drag acceleration transiently responses to transient storm-time disturbances. That is, there is an one-to-one correspondence between the KOMPSAT-1 drag accelerations and the storm events. We find that the drag acceleration correlates strongly with the level of geomagnetic disturbance. This indicates that the trajectory of KOMPSAT-1 is significantly perturbed during extremely disturbed intervals because of atmospheric density increase. The main contributor to the density increase is Joule heating associated with the geomagnetic activity rather than the solar EUV radiation, as reported by previous studies. We suggest that understanding how the upper atmosphere responses to the geomagnetic-associated heating is important to predict space weather impacts on low earth-orbiting satellites.
关键词：Atmospheric drag ;geomagnetic storm ;space weather