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干涉SAR提高地距方向分辨率的简明推导
Alternative TitleA concise formula derivation for ground2range2resolutionimprovement by InSAR
张云华; 江碧涛; 姜景山; 北京8701信箱
Department国家863计划微波遥感技术实验室
Source Publication电波科学学报
2007
Volume22Issue:4Pages:619-625
ISSN1005-0388
Language中文
Keyword干涉sar 调频步进脉冲信号 地距方向分辨率 匹配滤波 脉冲压缩
Abstract用两种方法对干涉SAR提高地距方向分辨率进行证明.第一种方法首先证明空间分离的调频步进脉冲信号与通常的调频步进脉冲信号在匹配滤波满足一定条件时是等同的.接着证明干涉SAR在地距方向的信号模型与空间分离的调频步进脉冲信号模型是等同的,进而推导出干涉SAR地距方向的观测频谱展宽的公式.第二种方法从电磁波空间波数k在地距方向的投影出发,同样推导出干涉SAR地距方向观测频谱展宽的公式.计算表明干涉SAR两个通道的斜距相对测量误差对分辨率的改善有显著影响.
Other AbstractTwo approaches were presented to show t he improvement of ground resolution by cross-track interferomet ric SAR.In the first app roach ,an equivalent relation was firstly derived between t he usual stepped2f requency chirp signal (SFCS)and the SFCS wit h all subchirp stransmitted at different positions(SFCS_ DP)when some condition was contented during matched filtering , and then t he signal model of InSAR in ground direction was shown to be equivalent to that of SFCS_DP,and finally an broadened spatial spect rum observed in ground direction was derived. In the second approach,the projection of wave number kinground direction was used to derive the widening of observed spatial spect rum.Simulations showed that the relative error of range measurements between two channels had remarkable influence on t he final result.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1896
Collection微波遥感部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
张云华,江碧涛,姜景山,等. 干涉SAR提高地距方向分辨率的简明推导[J]. 电波科学学报,2007,22(4):619-625.
APA 张云华,江碧涛,姜景山,&北京8701信箱.(2007).干涉SAR提高地距方向分辨率的简明推导.电波科学学报,22(4),619-625.
MLA 张云华,et al."干涉SAR提高地距方向分辨率的简明推导".电波科学学报 22.4(2007):619-625.
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