月球地形测绘和月球大地测量(5)

主要介绍月球地形测绘和月球大地测量的情况。第一部分论述了月球大地测量(Selenodesy)的定义和方法。月球大地测量的一个特点是它的观测数据绝大部分都要依靠航天探测器或环月、绕月卫星来获取。月球大地测量的内容可以考虑有三个方面:一是在月球上给出一个有确定定义的坐标参考系,并在其中布测一个控制网;二是确定这一月球参考系的大地测量几何和物理常数;三是求定月球的外部重力场。第二部分介绍月球地形测绘。重点介绍了月球地形的特点,它大体分为月海、月陆、环形山等三种类型。

Topography surveying and geodesy on the moon(5)

Lunar topography surveying and lunar geodesy are introduced in the paper. In the first part the definition and technology of Lunar Geodesy (Selenodesy) is briefly described. One of the characteristics of selenodesy is that most of its observation data of comes from the space probes or the satellites flying around or by the moon. It may be considered that there are three parts of the selenodesy, i.e. the first part includes a lunar coordinate reference system with correct definition, and in which a control network of selenodesy is measured. The second one is the determination of geometric and physical constants in the lunar coordinate reference system. The third one is the determination of lunar gravity field.Then the lunar topographic surveying and its behaviors are presented. There are main three kinds of lunar topography: lunar mare, lunar terrace, and lunar crater.