| Resolution improvement in both azimuthal and range directions with repeat-pass spaceborne SAR - art. no. 67460N | |
Yunhua Zhang ; Xiaojin Shi; Jingshan Jiang; 北京8701信箱
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| Department | 国家863计划微波遥感技术实验室 |
| Source Publication | Proceedings of the Society of Photo-Optical Instrumentation Engineers (Spie) |
| 2007 | |
| Pages | N7460-N7460 |
| Language | 英语 |
| ISSN | 0277-786X |
| ISBN | 978-0-8194-6904-5 |
| Abstract | This paper introduces a simple method to obtain a much higher resolution than the designed resolution in both azithumal and range directions for SAR by synthesizing the data taken by repeat passes without increasing any complexity in SAR hardware and satellite platform. The basic idea of the method is to firstly establish the equivalence between the signal models of repeat pass SAR signals in both azithumal and range directions and the signal model of stepped frequency chirp signals (SFCSs) when some conditions are presumed, i.e. for range direction, interferometric condition is required and for azimuthal direction, a small squint angle increase between repeat passes is required, and then using the already proposed method for SFCSs compression to process the data of repeat passes. In the course of processing, each observation in range direction or in azimuthal direction is treated as a subchirp in SFCSs. The major facts affecting the final resolution one could get are investigated and found. They are the relative range measurement accuracy and the absolute squint angle measurement accuracy between repeat passes. Detailed derivations and simulations are presented to show the effectiveness of the method. |
| Keyword | Spaceborne Sar Repeat-pass Resolution Improvement High-resolution Stepped Frequency Chirp Signals (Sfcss) Matched Filtering Doppler Spectrum Spatial Spectrum Combination |
| Conference Name | Conference on SAR Image Analysis, Modeling, and Techniques IX |
| Conference Date | 2007 |
| Conference Place | Florence, ITALY |
| Indexed By | CPCI |
| Document Type | 会议论文 |
| Identifier | http://ir.nssc.ac.cn/handle/122/1785 |
| Collection | 微波遥感部 |
| Corresponding Author | 北京8701信箱 |
| Recommended Citation GB/T 7714 | Yunhua Zhang,Xiaojin Shi,Jingshan Jiang,et al. Resolution improvement in both azimuthal and range directions with repeat-pass spaceborne SAR - art. no. 67460N[C]. BELLINGHAM:Spie-Int Soc Optical Engineering,2007:N7460-N7460. |
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| File Name/Size | DocType | Version | Access | License | ||
| 20076746N7460.pdf（278KB） | 开放获取 | CC BY-NC-SA | View Download | |||
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