SAR Imaging Degradation by Ionospheric Irregularities Based on TFTPCF Analysis
SAR Imaging Degradation by Ionospheric Irregularities Based on TFTPCF Analysis
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DOI：
10.1109/tgrs.2007.894563
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发表时间：
2007-04
影响因子：
8.2
通讯作者：
Lianlin Li;Fang Li
中科院分区：
文献类型：
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作者：
Lianlin Li;Fang Li
采用双频双位置相干函数(TFTPCF)分析了电离层不规则性对双径多视角星载合成孔径雷达(SAR)信号传播的影响。TFTPCF是从相位屏原理推导出来的。利用基于TFTPCF的模糊函数分析了电离层湍流对距离分辨和交叉分辨的影响。结果表明，在某些情况下，不规则性对合成孔径雷达成像的影响非常严重
The effects of ionospheric irregularities on spaceborne synthetic aperture radar (SAR) signal propagation with double path and multilook angle are studied in a model in which a two-frequency and two-position coherence function (TFTPCF) has been adopted for analysis. The TFTPCF is derived from the phase-screen principle. The ambiguity function based on TFTPCF has been used to analyze the effects of ionospheric turbulence on range resolution and cross resolution. The results show that, in some cases, the effects from the irregularities on SAR imaging can be very serious