摘要
距离-多普勒(R-D)模型和有理多项式(RPC)模型是星载SAR定位常用的两种计算模型,通过计算机模拟两种模型的实现过程,利用两景高差不同的radarsat-2数据,分别采集高程在45m以内的控制点和高程在128m以内的控制点,对R-D模型和RPC模型定位精度进行对比分析。分析结果表明,随着高程的增加,R-D模型定位精度提高,而RPC模型定位精度下降,因此基于R-D模型的星载SAR定位较适用于高差大的地区。
The range-doppler （R-D） model and the rational polynomial coefficient （RPC） model are two common computer models for space-borne SAR positioning. These two models are implemented and simulated by utilizing two scenes of radarsat-2 images with different elevations. The positioning accuracy for both the R-D model and the RPC model are compared and analyzed, based on the control points collected within the elevation 45m and 128m. Experimental results indicate that with the increasing of the elevation, the positioning accuracy for the R-D model will also increase, however, for the RPC model it will decrease. Therefore, the R-D model based space-borne SAR positioning work better in the areas with drastic elevation differences.
出处
《计算机工程与设计》
CSCD
北大核心
2013年第7期2599-2603,共5页
Computer Engineering and Design
基金
自然科学基金项目(41271425)
江苏省资源环境信息工程重点实验室(中国矿业大学)开放基金项目(JS201108)
关键词
计算机模拟
距离-多普勒模型
有理多项式模型
定位精度
控制点
computer simulatiom range-doppler model
rational polynomial coefficients model
location accuracy
control points
