高分六号高分全色相机高精度几何检校

High Precision Geometric Calibration of GF-6 High-resolution PAN Camera

高分六号全色影像的幅宽大于90 km,在大比例尺度地表量测中具有重要意义,而其高精度几何检校是遥感影像几何处理的关键环节,直接影响遥感卫星影像的可量测性。本文在缺少人工标靶数据和精密实验室几何成像标校参数的条件下,利用高分六号卫星辅助数据和参考数据,采用基于探元指向角的几何检校模型对高分六号高分全色相机进行高精度几何检校。经过检校之后高分六号全色影像的绝对定位精度优于50 m,内部相对定位精度优于4个像素,表明高分六号高分全色相机在经过高精度几何检校之后影像几何质量可以满足测绘需求。

The wide field of view PAN image on GF-6 Satellite more than 90 km,which is of great significance in large-scale surface measurement,and its high-precision geometric calibration is the key link of remote sensing image geometric processing,which directly affects the measurability of remote sensing satellite image.In this paper,where that in the absence of artificial target data and precise laboratory geometric imaging calibration parameters,using the high-resolution satellite auxiliary data,using the geometric calibration model based on the probe pointing angle to carry out high-precision geometric calibration of GF-6 high-resolution PAN camera.After calibration,the absolute positioning accuracy of GF-6 PAN image is better than 50 m,and the internal relative positioning accuracy is stable at 4 pixels.The image geometric quality of GF-6 high resolution PAN camera can meet the needs of surveying and mapping.