静止轨道卫星的对地观测高程修正方法

Elevation Correction Method for Earth Observation of Geostationary Satellites

随着静止轨道卫星影像空间分辨率的大幅度提升,静止轨道卫星的高程修正问题越来越被关注。根据新一代静止轨道卫星投影方式和成像模式的特点,针对传统的迭代搜索算法在某些特殊地面点无法收敛的问题,提出了一种在视向量上直接搜索地面遮挡点的算法,并结合直接搜索算法稳定性强、迭代搜索算法计算效率高的优势,设计了一套静止轨道卫星的高程修正解决方案,通过模拟实验,验证了该方案的有效性。

Along with the great improvement of the image spatial resolution of the geostationary satellite, elevation correction of geostationary satellite is increasingly attractive. According to the projective mode and imaging pattern of new generation geostationary satellites, in order to address the non-convergent problem caused by traditional iterative searching algorithm, a new algorithm which searches the occlusive points directly on the observing vectors is proposed. Then, a geostationary satellite elevation correction strategy which combines the strong stability of direct searching algorithm and high computational efficiency of iterative searching algorithm is developed. The simulative experiments show that the proposed strategy is valid.