基于地基无线电测量的月面目标精确定位技术研究

Lunar object positioning research based on ground-based radiometric tracking technique

2013年嫦娥三号将实施月面软着陆,对月面着陆点以及月面巡视器进行定位是月面目标导航中的一个重要环节。在复杂的月面环境下,需要以探测器作为基准,其定位精度直接影响到整个探测任务的执行效果和导航定位的性能。基于统计学原理,建立了基于地基无线电测量的月面目标定位方案和软件,使用地面手段对探测器在月面各阶段的测量方式进行仿真计算,分析了多种条件定位能力。计算表明,在当前测控条件下基于地基无线电测量的月面目标定位精度优于百米量级,该精度可以为月面软着陆任务提供借鉴和支持。

The performance of Chang＇ e-3 mission will land the probe on lunar surface in 2013. The landing site positioning and the precise point positioning for lunar rover is important for the mission performance, especially in the complex lunar environment. In the paper,the concept for lunar object positioning based on the statistical algo- rithm is proposed and precise positioning software is constructed. In addition,the simulation from ground-based ra- diometric techniques is performed. The results show that the positioning for lunar object is better than 100 m under current tracking condition,which is heloful for the onzoinz lunar soft landing mission.