卫星图像斜方位投影正反解变换研究

The research on the direct and inverse transformation of the oblique azimuth projection of satellite images

本文针对卫星动态获取的遥感图像,探讨其空间斜方位投影问题。利用空间几何理论建立其斜方位投影的数学模型,得到了该投影的精确表达式。并且利用矢量解法研究该投影模型的正解和反解变换算法以及星下点坐标计算方法,最后给出了算例。根据算例的结果分析表明,该投影的正反解变换均达到较高的精度。

The research of space projection of satellite image is a hot topic for cartographers. In this paper, the space oblique azimuth projection of satellite images which were taken dynamically, was discussed. The mathematic model of oblique azimuth projection was established and the precise formula of this projection was also obtained by space geometric principle. The direct and inverse transformation arithmetic of this projection was researched, and the arithmetic of the sub-satellite coordinates was also designed according to vector method. Some computational cases were given finally. From the analysis of computation result, it indicated that the direct and inverse transformation of this projection had very high precision.