提高深空异步激光测距精度方法研究

异步激光测距的作用距离远,有望实现对地球同步轨道以及深空航天器的精确测量。在对相关文献深入研究的基础上,全面分析了异步激光测距基本原理,对其钟差和测距公式进行了重新推导,提出了一种适用于深空异步激光测距的精确公式,并给出了迭代求解方法。通过理论仿真分析,在脉冲时间测量误差5ns时,对匀速飞行目标,该方法距离测量精度可达到5～6m,比其他方法高出2～3个数量级。

Method for Improving Asynchronous Laser Ranging Accuracy for Deep Space Applications

With long operational distance,asynchronous laser ranging system has a promising prospect for accurate instrumentation of geosynchronous orbit and deep space spacecraft.Based on research on literature concerned,this paper analyses the principle of asynchronous laser ranging.Then,a clock offset and ranging formulae is re-derived.An accurate asynchronous laser ranging formula together with resolving through iterations is proposed for deep space applications.Theoretical analysis and simulation indicates that,for a target flying at constant velocity,the ranging accuracy is 5~6 m when pulse time measurement error is 5 ns.In other words,the ranging accuracy of asynchronous laser ranging is 2~3 orders higher than conventional methods.