高分一号多光谱高分相机全色图像正射精度验证与分析

摘要

采用有理函数模型对高分一号卫星多光谱高分辨率相机（PMS）传感器全色图像进行正射校正，采集检查点检验正射后全色图像几何精度，获取全色图像的正射精度，为用户了解高分一号卫星全色图像正射精度提供参考依据。试验结果表明，高分一号卫星2m 分辨率的全色图像正射精度为1．6m，折合成像素精度为0．8个像素，能满足1∶1万比例尺地形图更新要求。经过初步分析，高精度高程数据能进一步提高高分一号卫星全色图像的正射精度。%After the successful launch of GF-1 satellite,to understand the accuracy of its pan ortho-image has extensive demands.This paper used the rational function model to rectify the pan image of GF-1 PMS sensor,then collected check points to test the geometric accuracy.The purpose of the test is easy for users to understand the precision of GF-1 pan orthoimage.The test results show that the average accuracy of panchromatic otho-image in GF-1 satellite is 1.62 meters,converted into pixel precision is 0.81 pixel,can meet the requirements of 1∶10000 scale topographic map updating.After a preliminary analysis,high precision digital elevation data can further improve the ortho-rectification accuracy of GF-1 panchromatic orthoimage.