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嫦娥一号卫星激光高度计获取了820多万个有效记录点,为了探索利用嫦娥一号卫星激光测高数据生成高精度的月球数字高程模型,本文提出了层次多结点样条算法,该算法利用一系列从粗糙到精细的多结点样条控制网格来逐步逼近或插值给定的激光测高数据.基于该算法,利用嫦娥一号卫星激光测高数据,生成了空间分辨率为0.0625°×0.0625°的全月球数字高程模型,并将该模型分别与ULCN2005和CLTM-s01及日本“月女神”模型进行了对比.同时,探讨了月面高程分布规律,并建立了嫦娥一号卫星高程的分布特征模型.全月球、月球正面高程呈正偏态、高峰态的正态分布;月球背面高程呈正偏态、低峰态的正态分布.
In order to explore the use of Chang'e-1 satellite laser altimeter data to generate high-precision lunar digital elevation model, this paper presents a hierarchical multi-node spline algorithm, which uses A series of coarse-to-fine multi-node spline control meshes are used to approximate or interpolate a given laser altimetry data.According to this algorithm, using Chang'e-1 satellite laser altimeter data, a spatial resolution of 0.0625 ° × 0.0625 °, and compared the model with the models of ULCN2005, CLTM-s01 and Japan “Moon Goddess ” respectively.At the same time, we discussed the lunar surface elevation distribution law and established Chang'e-1 Satellite lunar elevation model shows that the elevation of the lunar and lunar lunar surface is positive and the peak is normal.