精密轨道支持下的哨兵卫星TOPS模式干涉处理
哨兵卫星采用TOPS模式成像,为确保影像干涉相位偏差小于3°,方位向配准精确度需达到0.001个像素。本文论证了哨兵卫星精密轨道条件下进行几何配准即可达到较高的配准精度,满足增强谱分集进行方位向残余偏移量估计的前提条件,并基于DORIS软件实现哨兵卫星TOPS模式影像的几何配准和增强谱分集优化配准处理。地表方位向形变等信号可导致Burst干涉图之间发生相位跳变,并对增强谱分集估计几何配准残余偏移量时产生干扰,本文开展了相关的理论分析和数据处理试验,提出粗差探测方法消除相位跳变对增强谱分集配准的干扰。...
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| Published in | 测绘学报 Vol. 46; no. 9; pp. 1156 - 1164 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
武汉大学卫星导航定位技术研究中心,湖北武汉430079%武汉大学卫星导航定位技术研究中心,湖北武汉,430079%湖南科技大学煤炭资源清洁利用与矿山环境保护湖南省重点实验室,湖南湘潭,411201
2017
湖南科技大学煤炭资源清洁利用与矿山环境保护湖南省重点实验室,湖南湘潭411201 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-1595 |
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| Summary: | 哨兵卫星采用TOPS模式成像,为确保影像干涉相位偏差小于3°,方位向配准精确度需达到0.001个像素。本文论证了哨兵卫星精密轨道条件下进行几何配准即可达到较高的配准精度,满足增强谱分集进行方位向残余偏移量估计的前提条件,并基于DORIS软件实现哨兵卫星TOPS模式影像的几何配准和增强谱分集优化配准处理。地表方位向形变等信号可导致Burst干涉图之间发生相位跳变,并对增强谱分集估计几何配准残余偏移量时产生干扰,本文开展了相关的理论分析和数据处理试验,提出粗差探测方法消除相位跳变对增强谱分集配准的干扰。 |
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| Bibliography: | 11-2089/P interferometric synthetic aperture radar; terrain observation by progressive scans; Sentinel-1; geometric coregistration; enhanced spectral diversity WU Wenhao1,2,ZHOU ZhiweiSLI Too2,LONG Sichun1（1. Hunan Province Key Laboratory of Coal Resources Clean-utilization and Mine Environment Protection, Hunan University of Science and Technology, Xiangtan 4 11201, China; 2. GNSS Research Center of Wuhan University, Wuhan 430079, China） The TOPS imaging mode is the default operation mode of Sentinel-1 satellite,an overall azimuth coregistration accuracy of better than 0.001 pixels is required for this configuration in order to achieve the interferometric phase bias is less than three degrees.Based on the high accuracy of Sentinel-1 orbital information,this paper demonstrates a sufficiently high coregistration accuracy is able to be achieved by geometrical coregistration algorithm,which satisfies the pre-requirement for estimating the residual coregistration error by enhanced spectral diversity method.Based on |
| ISSN: | 1001-1595 |