ALOSPRISM影像的姿态角常差检校

摘要

Based on the imaging principle of ALOS/PRISM, a rigorous geometric model was established for direct georeferencing.The results of the experiment showed that there were constant angular errors existed in imagery ancillary data which were difficult to ignore. Then a constant angular error calibration model was used to analyse these errors. Once these constant angular errors were eliminated using one GCP in three different time imageries, the results were improved noticeably.%根据ALOS卫星PRISM传感器的成像原理,构建严格几何模型进行直接定位.通过对ALOS PRISM 3景不同时间的影像进行实验,验证了姿态角常差的存在,并建立影像姿态角常差检校模型对其进行校正.利用1个控制点改正姿态角常差后,定位精度提高显著.