多源国产高分卫星联合区域网平差精度分析研究

A study of block adjustment of domestic multi-source high resolution satellite images

多源数据联合平差不仅可以保证异源数据之间的接边精度,还可提高整体区域网的稳定程度,精度分析是多源联合平差的重要保障。随着国产卫星传感器类型的日益丰富,多源联合平差逐步应用于国产卫星数据,然而基于此方面的精度分析和其对单源数据平差产生影响等方面的研究相对缺乏。为此,以国产高空间分辨率卫星数据为研究对象,构建基于有理多项式(rational polynomial coefficient,RPC)的多源数据联合区域网平差模型,并对重庆市西部地区的高分一号(GF-1)、高分二号(GF-2)和资源三号(ZY-3)卫星数据进行多源联合区域网平差试验,通过设计不同控制点布设策略、统计平差结果的精度,综合分析不同方案下区域网平差对系统误差的改正效果及对单源数据产生的影响。试验结果表明,基于国产高分卫星的多源联合区域网平差方法可行,并对单源平差精度产生了积极作用。

Error precision analysis is the important guarantee of block adjustment(BA)of multi-source remote sensing data,because it not only guarantees the edge accuracy of different source data,but also improves the stability of the whole regional network adjustment.With the development of the domestic satellite,the multi-source BA has been applied to it;however,the research on precision analysis of multi-source BA and the relationship between multi-source and single-source BA is relatively deficient.According to RPC(rational polynomial coefficient),an experiment that has constructed the multi-source BA model of multi-source remote sensing data based on domestic satellite(GF-1,GF-2,ZY-3)of Chongqing area was carried out in this paper,where a series of effects of BA to correct the systematic errors and the relationship between multi-source and single-source BA were in-depth analyzed under the different plans of control points.The results show that the BA of domestic multi-source high resolution satellite images is feasible,which can also improve the accuracy for single-source BA.