摘要
资源三号卫星是中国第一颗民用高分辨率立体测绘卫星。本文基于上海地面控制点评估了该卫星的几何定位精度,分析了影像附带有理函数模型的几何误差分布规律,并进行基于平移改正、平移缩放改正以及仿射模型改正的误差补偿和不同立体组合定位精度的比较分析。实验结果表明,资源三号影像定位存在系统性误差,通过补偿有理多项式系数(RPC)的系统误差,能显著提高卫星影像的定位精度。
ZY-3 satellite is China’s first civil high-resolution stereo mapping satellite.This paper analyzes the geometric error distribution with vendor-supplied RPCs by experimental testing with ZY-3 satellite image,and the geometric positioning accuracy of the satellite is evaluated using Shanghai test field.Then the image bias correction model and geo-positioning based on rational function model is discussed,error compensation through translation model,shift and drift model,affine transformation model and comparatively analyzes the geolocation accuracy of different combinations.The results show that the geolocation accuracy of the RPC model would be significantly improved through compensating systematic error.
作者
龙杭
LONG Hang(College of Surveying and Geo-Informatics,Tongji University,Shanghai 200092,China)
出处
《科技视界》
2019年第11期9-10,共2页
Science & Technology Vision
