摘要
针对大区域多航带InSAR(干涉合成孔径雷达)影像定位及拼接时缺少GCP(地面控制点)的问题,提出了一种多航带InSAR影像联合定位的方法。该方法借鉴摄影测量中的光束法平差思想,并利用InSAR干涉定标后得到影像上各点高程值。通过对四川绵阳地区的多航带InSAR实际数据的实验,验证了本方法的可行性,且精度达到了各景影像独立校正的水平。分析了控制点数量、位置、重叠区域范围、地形起伏对平差精度的影响,并给出了控制点布放原则。
In order to solve the problem of lacking GCPs（ground control process of multi-strip InSAR（Interferometric Synthetic Aperture Radar） and mosaic, a union localization method is proposed in this paper. This use of the bundle block adjustment principle in photogrammetry, and uses points） during the images localization method makes the the height of ever-y point after interferometric calibration. The experimental result of multi-strip InSAR ima- ges in Sichuan province shows that this method is feasible, and the precision reaches the same level of the traditional method of correcting each image respectively. Then the influence factors on block adjustment accuracy are analyzed, these factors include the number of GCPs, the position of GCPs, the degree of overlap area and the terrain. At last, the basic principle of distribution plan of GCPs is given.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2012年第4期410-414,共5页
Geomatics and Information Science of Wuhan University
基金
国家863计划资助项目(2007AA120302)
国家自然科学基金资助项目(40701110)
