| Technology and Methodology |
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Optimal Incidence Angle Pair Selection for Dual-aspect Compensation in High Resolution SAR Data |
| WANG Guo-jun1,2, SHAO Yun1, WAN Zi1,3, ZHANG Feng-li1 |
1. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101, China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China;
3. Zhejiang Water Conservancy Estuary Institute, Hangzhou 310020, China |
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Abstract In the dual-aspect compensation procedure, the best compensated result occurs under the condition of optimal incidence angle pair, which varies with terrain. Nevettheless, the problem as to how to obtain this pair remains unsolved. To solve this problem, this paper proposes a new method in search for the optimal incidence angle pair based on simulation. Firstly, DEM data are used to produce the layover and shadow mask images at different incidence angles from two different aspect directions respectively. Then from these images, the optimal incidence angle pair was searched out to obtain the best compensating result. On such a basis, the best incidence angle pairs in three areas of different topographic condition for the "dual-aspect compensation" method were given by experiment and the effects were analyzed. The results show that, with this method, the incidence angle pair could be obtained easily and effectively. The method can therefore guide the users to order the best SAR data when they use the dual-aspect compensation in mountainous areas, and this is the essential step in dual-aspect compensation.
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| Keywords
lake change
climate change
change of frozen ground, glacier and snow line
Nagqu district, Tibet
remote sensing
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Issue Date: 13 November 2012
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| [1] 陈尔学.星载合成孔径雷达影像正射校正方法研究[D].北京:中国林业科学研究院,2004.Chen E X.Study on Ortho-rectification Methodology of Space-borne Synthetic Aperture Radar Imagery[D].Beijing:Chinese Academy of Forestry,2004(in Chinese with English Abstract).[2] 张永红.合成孔径雷达成像几何机理分析及处理方法研究[D].武汉:武汉大学,2001.Zhang Y H.Synthetic Aperture Radar Imaging Geometry Understanding and Processing[D].Wuhan:Wuhan University,2001(in Chinese with English Abstract). [3] 万紫,邵芸,谢酬,等.基于RADARSAT-2数据的SAR图像双视向几何校正方法研究[J].红外与毫米波学报,2011,30(2):167-172.Wan Z,Shao Y,Xie C,et al.The Dual-aspect Geometric Correction Method Based on DEM Using Radarsat-2 Data[J].Journal of Infrared and Millimeter Waves,2011,30(2):167-172(in Chinese with English Abstract).[4] 万紫,徐茂松,夏忠胜,等.高分辨率雷达图像双视向几何纠正方法研究[J].国土资源遥感,2010(2):12-16.Wan Z,Xu M S,Xia Z S,et al.The Dual-aspect Geometric Correction Method Based on DEM for High Resolution SAR Images[J].Remote Sensing for Land and Resources,2010(2):12-16,21(in Chinese with English Abstract).[5] MacDonald,Dettwiler,Associates Ltd.Radarsat-2 Product Description[EB/OL].[2009-11-2].http://gs.mdacorporation.com/products/sensor/radarsat2/RS2_Product_Description.pdf.[6] [JP+1] German Aerospace Center.TerraSAR-X Ground Segment Basic Product Specification Document[EB/OL].[2008-2-24].http://www-igm.univ-mlv.fr/~riazano/enseignement/SR-FUSION-COURS/TX-GS-DD-3302_SAR_Basic_Products.pdf.[7] Gunidon B.Development of a SAR Data Acquisition Planning Tool (SARPLAN) Based on Image Simulation[J].International Journal of Remote Sensing,1993,14(2):333-344.[8] 郭华东.雷达对地观测理论与应用[M].北京:科学出版社,2000:183-191.Guo H D.Theory and Application of Radar for Earth Observations[M].Beijing:Science Press,2000:183-191(in Chinese).[9] 吴涛.星载SAR图像模拟研究[D].北京:中国科学院遥感应用研究所,2008.Wu T.Study on Simulation of Space-borne Synthetic Aperture Radar Imagery[D].Beijing:Remote Sensing Application Research Institute of the Chinese Academy of Sciences,2008(in Chinese with English Abstract). |
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2012,
Vol. 24
