| 在大气中SAR的额外光程 |
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| 引用本文： | 韩文焌,江长荫. 在大气中SAR的额外光程[J]. 电波科学学报, 2004, 19(6): 658-662 |
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| 作者姓名： | 韩文焌 江长荫 |
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| 作者单位： | 中国电子科技集团公司第二十二研究所,河南,新乡,453003;中国科学院国家天文台,北京,100012;中国电子科技集团公司第二十二研究所,河南,新乡,453003 |
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| 摘 要： | 根据不规则体的尺度讨论了大气引起的SAR相位(在此,描述为额外光程或额外时延).根据大气模型计算了SAR的额外时延、相位起伏噪声,结合不规则体的尺度解释了视场中心的位移和图像的畸变.总结出与工程设计有关的数据,诸如在太阳活动高、低年周期内,最佳频率的选择,在一般大气情况下,额外光程的范围,以及相位噪声的大小等.
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| 关 键 词： | 综合孔径雷达(SAR) 大气效应 额外光程 |
| 文章编号： | 1005-0388(2004)06-0658-05 |
| 修稿时间： | 2003-10-25 |
Excessive path for SAR in atmosphere |
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| HAN Wen-jun , JIANG Chang-yin. Excessive path for SAR in atmosphere[J]. Chinese Journal of Radio Science, 2004, 19(6): 658-662 |
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| Authors: | HAN Wen-jun JIANG Chang-yin |
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| Affiliation: | HAN Wen-jun 1,2 JIANG Chang-yin1 |
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| Abstract: | Signal phase (described as excessive path or excessive time delay here) for SAR induced due to atmospheric irregularity with different scale length is discussed in this paper. Associating the scale length of irregularity, the center displacement of field of view and the distortion on the image is explained. Based on the atmospheric model, the excessive time delay and atmospheric phase noise are calculated. Some useful data for engineering design are listed, such as how to select the optimum working frequencies for solar activity durations of high and of low periods, the range of excessive path under normal atmospheric condition, and the magnitude of phase noise. |
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| Keywords: | SAR atmospheric effect excessive path |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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