一种基于参数更新的机载SAR图像目标定位方法
|
摘要
目标定位精度是机载合成孔径雷达(SAR)系统的一项重要技术指标,因此机载SAR图像目标定位具有重要的应用价值。在基于距离-多普勒模型的SAR图像目标定位方法中,载机运动参数的精度会直接影响定位的精度,在机载平台导航精度受限的情况下,定位精度会受到很大影响。因此,该文提出一种基于距离-多普勒模型参数更新的机载SAR图像目标定位方法,利用机载SAR图像与基准图像匹配得到的匹配点来对载机运动参数进行更新,提高参数的精度,进而提高定位的精度。实验证明了该方法的有效性。
The target location accuracy is an important technical parameter of airborne SAR system, thus the target location of airborne SAR image is important for application. The precision of the moving parameters directly influences the precision of the SAR image target location algorithm based on the Range-Doppler(RD)model. The locating accuracy is greatly affected if the navigation accuracy of the airborne platform is limited.To solve this problem, an airborne SAR image target location algorithm based on RD model parameter refining is proposed. Using the matching points of airborne SAR image matching with the reference image, the moving parameters are refined with better accuracy, and the locating accuracy is improved. The experiments show that the proposed algorithm is effective.
The target location accuracy is an important technical parameter of airborne SAR system, thus the target location of airborne SAR image is important for application. The precision of the moving parameters directly influences the precision of the SAR image target location algorithm based on the Range-Doppler(RD)model. The locating accuracy is greatly affected if the navigation accuracy of the airborne platform is limited.To solve this problem, an airborne SAR image target location algorithm based on RD model parameter refining is proposed. Using the matching points of airborne SAR image matching with the reference image, the moving parameters are refined with better accuracy, and the locating accuracy is improved. The experiments show that the proposed algorithm is effective.
引文
[1]保铮,邢孟道,王彤.雷达成像技术[M].北京,电子工业出版社,2005:2-6.
[2]范剑超,王德毅,赵建化,等.高分三号SAR影像在国家海域使用动态监测中的应用[J].雷达学报,2017,6(5):456-472.doi:10.12000/JR17080.FAN Jianchao,FAN Deyi,ZHAO Jianhua,et al.National sea area use dynamic monitoring based on GF-3 SARimagery[J].Journal of Radars,2017,6(5):456-472.doi:10 .12000/JR17080.
[3]刘泽宇,柳彬,郭炜炜,等.高分三号NSC模式SAR图像舰船目标检测初探[J].雷达学报,2017,6(5):473-482.doi:10.12000/JR17059.LIU Zeyu,LIU Bin,GUO Weiwei,et al.Ship detection in GF-3 NSC mode SAR images[J].Journal of Radars,2017,6 (5):473-482.doi:10.12000/JR17059.
[4]周金萍.SAR产品图像像素定位方法选择与参数优化[J].上海航天,2000(1):32-39.doi:10.19328/j.cnki.1006-1630.2000.01.007.ZHOU Jinping.Selection and optimization of the location method for pixels in SAR imagery[J].Aerospace Shanghai,2000(1):32-39.doi:10.19328/j.cnki.1006-1630.2000.01.007.
[5]尤红建,丁赤飚,付琨.SAR图像对地定位的严密共线方程模型[J].测绘学报,2007,36(2):158-162.doi:10.3321/j.issn:1001-1595.2007.02.008.YOU Hongjian,DING Chibiao,and FU Kun.SAR image localization using rigorous SAR collinearity equation model[J].Acta Geodaetica et Cartographica Sinica,2007,36(2):158-162.doi:10.3321/j.issn:1001-1595.2007.02.008.
[6]JOHN C C and ROBERT M M.Synthetic Aperture Radar:Systems and Signal Processing[M].New York:John Wiley&Sons,Inc,1991:1-100.
[7]张耀天,孙进平,毛士艺.机载SAR图像直接定位算法研究[J].信号处理,2009,25(4):669-673.doi:10.3969/j.issn.1003-0530.2009.04.032.ZHANG Yaotian,SUN Jinping,and MAO Shiyi.Study on direct location algorithm for airborne SAR image[J].Signal Processing,2009,25(4):669-673.doi:10.3969/j.issn.1003-0530.2009.04.032.
[8]杨杰,潘斌,李德仁,等.无地面控制点的星载SAR影像直接对地定位研究[J].武汉大学学报·信息科学版,2006,31(2):144-147.doi:10.3969/j.issn.1671-8860.2006.02.013.YANG Jie,PAN Bin,LI Deren,et al.Location of spaceborne SAR imagery without reference points[J].Geomatics and Information Science of Wuhan University,2006,31(2):144-147.doi:10.3969/j.issn.1671-8860.2006.02.013.
[9]傅文学,郭小方,田庆久.星载SAR距离-多普勒定位算法中地球模型的修正[J].测绘学报,2008,37(1):59-63.doi:10.3321/j.issn:1001-1595.2008.01.011.FU Wenxue,GUO Xiaofang,and TIAN Qingjiu.Correction of earth model in range-doppler location algorithm[J].Acta Geodaetica et Cartographica Sinica,2008,37(1):59-63.doi:10.3321/j.issn:1001-1595.2008.01.011.
[10]尤红建,丁赤彪,向茂生.机载高分辨率SAR图像直接对地定位原理及精度分析[J].武汉大学学报·信息科学版,2005,30(8):712-715.doi:10.3969/j.issn.1671-8860.2005.08.013.YOU Hongjian,DING Chibiao,and XIANG Maosheng.Principle and accuracy for airborne SAR image direct localization[J].Geomatics and Information Science of Wuhan University,2005,30(8):712-715.doi:10.3969/j.issn.1671-8860.2005.08.013.
[11]陆静,郭克成,陆洪涛.星载SAR图像距离-多普勒定位精度分析[J].雷达科学与技术,2009,7(2):102-106.doi:10.3969/j.issn.1672-2337.2009.02.005.LU Jing,GUO Kecheng,and LU Hongtao.Analysis of R-Dlocation precision in spaceborne SAR image[J].Radar Science and Technology,2009,7(2):102-106.doi:10.3969/j.issn.1672-2337.2009.02.005.
[12]SCHUBERT A,SMALL D,JEHLE M,et al.COSMO-skymed,Terra SAR-X,and RADARSAT-2 geolocation accuracy after compensation for earth-system effects[C].2012 IEEE International Geoscience and Remote Sensing Symposium,Munich,Germany,2012:3301-3304.
[13]丁赤飚,刘佳音,雷斌,等.高分三号SAR卫星系统级几何定位精度初探[J].雷达学报,2017,6(1):11-16.doi:10.12000/JR17024.DING Chibiao,LIU Jiayin,LEI Bin,et al.Preliminary exploration of systematic geolocation accuracy of GF-3 SARsatellite system[J].Journal of Radars,2017,6(1):11-16.doi:10.12000/JR17024.
[14]梅海文,孟自强,李亚超,等.双基前视SAR几何定位及同步误差分析[J].电子与信息学报,2018,40(4):882-889.doi:10.11999/JEIT170677.MEI Haiwen,MENG Ziqiang,LI Yachao,et al.Bistatic forward-looking SAR geometrical positioning and analysis of synchronization error[J].Journal of Electronics&Information Technology,2018,40(4):882-889.doi:10.11999/JEIT170677.
[15]YUE Linwei,SHEN Huanfeng,ZHANG Liangpei,et al.High-quality seamless DEM generation blending SRTM-1,ASTER GDEM v2 and ICESat/GLAS observations[J].Isprs Journal of Photogrammetry&Remote Sensing,2017,123:20-34.doi:10.1016/j.isprsjprs.2016.11.002.
[2]范剑超,王德毅,赵建化,等.高分三号SAR影像在国家海域使用动态监测中的应用[J].雷达学报,2017,6(5):456-472.doi:10.12000/JR17080.FAN Jianchao,FAN Deyi,ZHAO Jianhua,et al.National sea area use dynamic monitoring based on GF-3 SARimagery[J].Journal of Radars,2017,6(5):456-472.doi:10 .12000/JR17080.
[3]刘泽宇,柳彬,郭炜炜,等.高分三号NSC模式SAR图像舰船目标检测初探[J].雷达学报,2017,6(5):473-482.doi:10.12000/JR17059.LIU Zeyu,LIU Bin,GUO Weiwei,et al.Ship detection in GF-3 NSC mode SAR images[J].Journal of Radars,2017,6 (5):473-482.doi:10.12000/JR17059.
[4]周金萍.SAR产品图像像素定位方法选择与参数优化[J].上海航天,2000(1):32-39.doi:10.19328/j.cnki.1006-1630.2000.01.007.ZHOU Jinping.Selection and optimization of the location method for pixels in SAR imagery[J].Aerospace Shanghai,2000(1):32-39.doi:10.19328/j.cnki.1006-1630.2000.01.007.
[5]尤红建,丁赤飚,付琨.SAR图像对地定位的严密共线方程模型[J].测绘学报,2007,36(2):158-162.doi:10.3321/j.issn:1001-1595.2007.02.008.YOU Hongjian,DING Chibiao,and FU Kun.SAR image localization using rigorous SAR collinearity equation model[J].Acta Geodaetica et Cartographica Sinica,2007,36(2):158-162.doi:10.3321/j.issn:1001-1595.2007.02.008.
[6]JOHN C C and ROBERT M M.Synthetic Aperture Radar:Systems and Signal Processing[M].New York:John Wiley&Sons,Inc,1991:1-100.
[7]张耀天,孙进平,毛士艺.机载SAR图像直接定位算法研究[J].信号处理,2009,25(4):669-673.doi:10.3969/j.issn.1003-0530.2009.04.032.ZHANG Yaotian,SUN Jinping,and MAO Shiyi.Study on direct location algorithm for airborne SAR image[J].Signal Processing,2009,25(4):669-673.doi:10.3969/j.issn.1003-0530.2009.04.032.
[8]杨杰,潘斌,李德仁,等.无地面控制点的星载SAR影像直接对地定位研究[J].武汉大学学报·信息科学版,2006,31(2):144-147.doi:10.3969/j.issn.1671-8860.2006.02.013.YANG Jie,PAN Bin,LI Deren,et al.Location of spaceborne SAR imagery without reference points[J].Geomatics and Information Science of Wuhan University,2006,31(2):144-147.doi:10.3969/j.issn.1671-8860.2006.02.013.
[9]傅文学,郭小方,田庆久.星载SAR距离-多普勒定位算法中地球模型的修正[J].测绘学报,2008,37(1):59-63.doi:10.3321/j.issn:1001-1595.2008.01.011.FU Wenxue,GUO Xiaofang,and TIAN Qingjiu.Correction of earth model in range-doppler location algorithm[J].Acta Geodaetica et Cartographica Sinica,2008,37(1):59-63.doi:10.3321/j.issn:1001-1595.2008.01.011.
[10]尤红建,丁赤彪,向茂生.机载高分辨率SAR图像直接对地定位原理及精度分析[J].武汉大学学报·信息科学版,2005,30(8):712-715.doi:10.3969/j.issn.1671-8860.2005.08.013.YOU Hongjian,DING Chibiao,and XIANG Maosheng.Principle and accuracy for airborne SAR image direct localization[J].Geomatics and Information Science of Wuhan University,2005,30(8):712-715.doi:10.3969/j.issn.1671-8860.2005.08.013.
[11]陆静,郭克成,陆洪涛.星载SAR图像距离-多普勒定位精度分析[J].雷达科学与技术,2009,7(2):102-106.doi:10.3969/j.issn.1672-2337.2009.02.005.LU Jing,GUO Kecheng,and LU Hongtao.Analysis of R-Dlocation precision in spaceborne SAR image[J].Radar Science and Technology,2009,7(2):102-106.doi:10.3969/j.issn.1672-2337.2009.02.005.
[12]SCHUBERT A,SMALL D,JEHLE M,et al.COSMO-skymed,Terra SAR-X,and RADARSAT-2 geolocation accuracy after compensation for earth-system effects[C].2012 IEEE International Geoscience and Remote Sensing Symposium,Munich,Germany,2012:3301-3304.
[13]丁赤飚,刘佳音,雷斌,等.高分三号SAR卫星系统级几何定位精度初探[J].雷达学报,2017,6(1):11-16.doi:10.12000/JR17024.DING Chibiao,LIU Jiayin,LEI Bin,et al.Preliminary exploration of systematic geolocation accuracy of GF-3 SARsatellite system[J].Journal of Radars,2017,6(1):11-16.doi:10.12000/JR17024.
[14]梅海文,孟自强,李亚超,等.双基前视SAR几何定位及同步误差分析[J].电子与信息学报,2018,40(4):882-889.doi:10.11999/JEIT170677.MEI Haiwen,MENG Ziqiang,LI Yachao,et al.Bistatic forward-looking SAR geometrical positioning and analysis of synchronization error[J].Journal of Electronics&Information Technology,2018,40(4):882-889.doi:10.11999/JEIT170677.
[15]YUE Linwei,SHEN Huanfeng,ZHANG Liangpei,et al.High-quality seamless DEM generation blending SRTM-1,ASTER GDEM v2 and ICESat/GLAS observations[J].Isprs Journal of Photogrammetry&Remote Sensing,2017,123:20-34.doi:10.1016/j.isprsjprs.2016.11.002.