嫦娥一号激光高度计在轨测量数据误差分析研究

利用嫦娥一号卫星(CE-1)激光高度计在轨探测科学数据,研究激光高度计月球高程探测误差。对月球南北极纬度60°～90°范围进行月球表面区域划分,进行高程测量重复点的搜索、区域高程粗差的剔除、残差和标准差的计算,并给出处理后区域残差与标准差的分布,对月球南北极区的处理结果作出对比分析,得出南极区纬度60°～90°内区域平均标准差较北极区域偏大。该处理结果为进一步分析激光高度计测量误差的来源提供科学依据,为探月卫星携带的各种有效载荷的设计在精度要求上提供理论指导和参考数据。

Errors Analysis on Lunar Surface On-orbit Elevation Data Measurement with the Laser Altimeter on Chang‘e-1 Satellite

To study the detecting errors of lunar elevation of Laser Altimeter, the on-orbit measurement data obtained from Laser Altimeter of Chinese Chang’e-1 is investigated. Firstly, the elevation data from latitude 60°to 90°in the South and North Polar Regions are divided into different small sectors along latitude directions. Secondly, a series of process were developed in each small sector, such as searching the elevation repeated data, rejecting the gross error (pseudo elevation) data, calculating the residual error and standard deviation and presenting the results. Finally, the processing results from the South and North Polar Regions were compared and analyzed. And it turned out that the average standard deviation of the South Polar Regions which latitude is between 60°and 90° is larger than that of the North Polar Region. The research results will provide the scientific basis for further analyzing error sources of Laser Altimeter. And they also offer theory guidance and reference data to the design of effective loading which exploring satellites carry.