利用RPC模型进行IKONOS影像的精确定位

Precise Positioning of IKONOS Satellite Images Based on RPC Model

研究了IKONOS卫星影像基于RPC模型的立体定位算法与区域网平差方法。针对立体定位计算过程中RPC(Rational Polynomial Coefficients)模型存在的系统性误差,给出了物方和像方补偿方案。实验结果表明,各种补偿方案均可有效消除RPC模型的系统误差,取得优于1.3 m的定位精度;区域网平差的定位精度可达1.1 m,是最理想的定位方法。

This paper puts emphasis on the derivation of stereo positioning and block adjustment algorithm based on the RPC models of IKONOS images. According to the systematic error of RPC models in stereo positioning, the object space scheme and image space scheme are provided to compensate it. Test results show that both schemes can reduce the systematic error effectively, and the positioning accuracy is better than 1.3 meters. Block adjustment is the best way for positioning and its accuracy is up to 1.1 meters.