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电离层闪烁对星载P波段SAR的影响分析

冯健 甄卫民 吴振森 刘钝

冯健, 甄卫民, 吴振森, 刘钝. 电离层闪烁对星载P波段SAR的影响分析[J]. 电子与信息学报, 2015, 37(6): 1443-1449. doi: 10.11999/JEIT140948
引用本文: 冯健, 甄卫民, 吴振森, 刘钝. 电离层闪烁对星载P波段SAR的影响分析[J]. 电子与信息学报, 2015, 37(6): 1443-1449. doi: 10.11999/JEIT140948
Feng Jian, Zhen Wei-min, Wu Zhen-sen, Liu Dun. Effects of Ionospheric Scintillation on P Band Spaceborne SAR[J]. Journal of Electronics & Information Technology, 2015, 37(6): 1443-1449. doi: 10.11999/JEIT140948
Citation: Feng Jian, Zhen Wei-min, Wu Zhen-sen, Liu Dun. Effects of Ionospheric Scintillation on P Band Spaceborne SAR[J]. Journal of Electronics & Information Technology, 2015, 37(6): 1443-1449. doi: 10.11999/JEIT140948

电离层闪烁对星载P波段SAR的影响分析

doi: 10.11999/JEIT140948
基金项目: 

国家国际科技合作专项(2011DFA22270)资助课题

Effects of Ionospheric Scintillation on P Band Spaceborne SAR

  • 摘要: 电离层闪烁会破坏星载合成孔径雷达(SAR)回波信号之间的相关性,使其成像性能下降。已有的工作都是假设已知电离层电子密度的扰动开展的,但是目前的测量手段无法直接获取该参量。该文利用海口观测站超高频(UHF)频段太阳活动高年和中等年份的实测数据,分析电离层闪烁的变化特征,并基于相位屏理论,给出一种利用闪烁指数评估电离层闪烁对星载P波段SAR系统影响效应的方法。结果表明:电离层闪烁在低纬地区主要发生在夜间,且在两分季高发;太阳活动高年,全年约有3.8%的时间会发生电离层闪烁现象;对于P波段SAR系统来说,弱闪烁使得方位向冲激响应函数(IRF)的主瓣宽度和副瓣增益增大,分辨率下降;中等强度闪烁使得方位向冲激响应函数发生严重的扰动,副瓣增益增大到主瓣的水平,主瓣中心也发生平移,可能使得系统无法直接成像。
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  • 被引次数: 0
出版历程
  • 收稿日期:  2014-07-17
  • 修回日期:  2014-11-05
  • 刊出日期:  2015-06-19

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