双站SAR的海面速度聚束调制机理研究

余颖; 王小青; 朱敏慧; 肖疆

doi:10.3724/SP.J.1146.2007.01375

双站SAR的海面速度聚束调制机理研究

doi: 10.3724/SP.J.1146.2007.01375

余颖^{①② 王小青,},
王小青,
朱敏慧,
肖疆

基金项目:

国家自然科学基金(40706063)资助课题

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- 被引次数: 0
出版历程
- 收稿日期: 2007-08-29
- 修回日期: 2007-12-21
- 刊出日期: 2008-12-19

A Study on Bistatic SAR Velocity Bunching Modulation of Ocean Surface

Yu Ying^{①② 王小青
,},
Wang Xiao-Qing,
Zhu Min-Hui,
Xiao Jiang

摘要

摘要: 为了利用双站SAR对海洋进行研究，首先必须正确理解双站SAR对海面成像的调制机理。而速度聚束调制是SAR所特有的调制机理。该文推导出平飞斜视情况下双站SAR图像平面中方位向强度变化表达式，定量地描述了目标方位位置偏移量和方位向分辨率的下降程度。并在线性近似条件下，求得双站SAR的线性速度聚束调制传递函数。通过仿真分析，定性地给出载机观测条件对双站SAR海浪线性成像范围大小的影响。
- 双站SAR /
- 海面 /
- 速度聚束调制 /
- 观测条件
Abstract: In order to develop bistatic SAR ocean investigation, the first issue is the study of bistatic SAR ocean surface imaging mechanism. And velocity bunching mechanism is a SAR inherent modulation. Thus, the intensity expression in the bistatic SAR image plane is derived in this paper. The expression describes quantificationally the displacement of the scatter elements in the image plane and a degradation in radar resolution in azimuthal direction. In addition, a bistatic SAR linear velocity bunching transfer function is obtained in the linear parameter regime. Finally, this paper analyzes qualitatively the effects that various platform observation conditions have on the bistatic SAR linear imaging range of wave spectrum.
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[1] Moccia A.[J].Rufino G, and DErrico M, et al.. BISSAT: Abistatic SAR for earth observation. Phase A StudyFinalReport, ASI Research contract I/R/213/0.2001,:- Martin M, Klupar P, and Kilberg S, et al.. Techsat 21 andrevolutionizing space missions using microsatellites. 15th Am.Inst. of Aeronaut. and Astronaut. Conf. on Small Satellites2001, Utah, USA, 2001, SSC01-1-3. [2] Massonnet D. Capabilities and limitations of theinterferometric cartwheel[J].IEEE Trans. on Geoscience andReomte Sensing.2001, 39(3):506-520 [3] 刘建平, 梁甸农. 星载双/多站SAR系统地面分辨特性影响分析. 信号处理, 2006, 22(3): 307-311.Liu Jian-ping and Liang Dian-nong. Effect analysis of groundresolution performance for bi-and multi-static spaceborneSAR system. Signal Processing, 2006, 22(3): 307-311. [4] 张勇胜, 梁甸农, 董臻. 星载寄生式SAR系统频率同步分析.国防科技大学学报, 2006, 28(2): 85-110.Zhang Yong-sheng, Liang Dian-nong, and Dong Zhen.Analysis of frequency synchronization error in spaceborneparasitic SAR system. Journal of National University ofDefense Technology, 2006, 28(2): 85-110. [5] 李宁, 何峰, 梁甸农. 双站SAR距离徙动算法. 现代电子技术,2007, (5): 38-40.Li Ning, He Feng, and Liang Dian-nong. Range migrationalgorithm of bistatic SAR. Modern Electronic Technology,2007, (5): 38-40. [6] 朱振波, 汤子跃, 蒋兴舟. 机载双站合成孔径雷达ChirpScaling成像算法[J].电子与信息学报.2006, 28(6):977-981浏览 [7] Alpers W R, Rufenach C L, and Ross D B. On theDetectability of ocean surface waves by real and syntheticaperture radar[J].Journal of Geophysical Research.1981,86(C7):6481-6498 [8] Alpers W R and Rufenach C L. The effect of orbital motionson synthetic aperture radar imagery of ocean waves[J].IEEETrans. on Antennas and Propagation.1979, 27(5):685-690 [9] Bruning C, Alpers W R, and Schroter J G. On the focusing1 of synthetic aperture radar imaging of ocean waves[J].IEEE Trans. on Geoscience and Reomte Sensing.1991, 29(1):120-128 [10] Moccia A, Rufino G, and DeLuca M. Oceanographicapplications of spaceborne bistatic SAR. Geoscience andRemote Sensing Symposium, IGARSS '03, Toulouse, France,2003: 1452-1454. [11] Plant W J. A stochastic, multiscale model of microwavebackscatter. Journal of Geophysical Research, 2002, 107(C9):3120.

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