针对高程数据，给出一种规则化插补的重采样方法和基于着陆区平面拟合的粗糙度与坡度提取算法。
For elevation data, a regularized interpolation for resampling and an algorithm for extracting terrain roughness and slope with landing area plane fitting are presented.
由于坡度、坡向和地形之间相互遮蔽等局地地形因子的影响，实际起伏地形下的日照时间与水平面上的日照时间有一定差异。
Due to local terrain factors such as slope, aspect and terrain inter-shielding, the insolation duration over rugged terrain is different from over horizontal surface.
由于坡度、坡向和地形之间相互遮蔽等局地地形因子的影响，实际起伏地形下的日照时间与水平面上的日照时间有一定差异。
Due to local terrain factors such as slope, aspect and terrain inter-shielding, the insolation duration over rugged terrain is different from over horizontal surface.
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