“天绘一号”卫星中级产品质量控制方法研究

摘要

In order to meet different needs,the TH-01 satellite provides users with a series of various image products.TH-01 satellite intermediate products are sent to users in the form of rational polynomial confficients,mainly used for different surveying and mapping process.This form not only hides the sensor's technical parameters,but also can get the same precision of rigorous geometrical model.To provide normative various level image products of high quality,especially the intermediate products is the important responsibility of space surveying and mapping.In this paper,the basic information and the intermediate products processing steps of TH-01 satellite are introduced and the stereo positioning method based on RPC models is given.A quality control method of detecting positioning accuracy based on VirtuoZo SAT software and RPC stereo positioning using three-line-array airborne imagery is brought forward,and quality control software is designed based on RPC model stereo position.Through TH-01 satellite's experiment and practical application,this method can control quality of intermediate products effectively.The quality control software not only raises quality control efficiency,but also controls product quality.The research result in this paper can provide reference to quality control of similar kinds surveying and mapping satellites,and establishes a technical base for follow-on TH satellite quality control automatization.%“天绘一号”卫星提供多种影像产品以满足不同用户的需求,其中卫星中级产品以有理多项式系数(Rational Polynomial Coefficient,RPC)形式分发给用户,用于各类测绘处理.该形式既能实现传感器技术参数的隐藏,又能达到与严格几何模型相当的定位精度.为用户提供高质量(quality,下同)、规范化的各级尤其是中级卫星数据产品,是航天测绘的重要职责.文章对“天绘一号”卫星中级产品基于RPC模型立体定位的质量控制方法进行了研究,文中介绍了“天绘一号”卫星基本情况及中级产品处理流程,给出了基于RPC模型的立体定位方法,提出了基于VirtuoZo SAT和RPC立体定位的三线阵影像邻轨接边精度检测质量控制方法,并编写了基于RPC模型立体定位的质量控制软件.通过试验及实际应用情况表明,该方法能够有效检测中级产品精度,质量控制软件的编写提高了质检效率,保障了产品质量.文章的研究成果不仅可为同类测绘卫星数据成果质量控制工作提供参考,也将为后续“天绘”系列卫星数据成果质量控制自动化提供技术基础.