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“天都一号”环月卫星双向激光测距技术实现方法

Implementation Approach of Bidirectional Laser Ranging Technology for “Tiandu-1” Circumlunar Satellite

  • 摘要: 针对“天都一号”通导技术试验星双向激光测距技术成功率受多重因素制约并且缺乏系统性任务规划策略的问题,提出一种融合时间窗口优化与关键参数调控的系统性解决方案。通过建立激光测距时间窗口模型,分析最佳观测时段,结合光行差、测距距离、大气衰减等因素建立数学模型并进行数值仿真,定量分析了各因素对成功率的影响机制。结果表明:卫星光行差是主导因素,优化后可提升成功率超3倍,尤其是在卫星高度角大于30°、近地位置观测及优良天气条件可显著提升回波率。基于仿真结果,进一步提出适用于“鹊桥”卫星任务规划中的观测窗口优选策略,为提高成功率环月激光测距提供了一种通用策略。

     

    Abstract: To address the problem that the success rate of two-way laser ranging for “Tiandu-1” communication and navigation test satellite is constrained by multiple factors and lacks a systematic mission-planning strategy, a comprehensive solution integrating time-window optimization and key parameter regulation was proposed. By constructing a time window model for lunar satellite laser ranging, the optimal observation period was determined. A mathematical model was developed incorporating factors such as light aberration, ranging distance, and atmospheric attenuation, followed by numerical simulations. A quantitative analysis of the influence mechanism of each factor on the success rate was made. Results show that satellite aberration was the major influencing factor, which, when optimized, improved the success rate by more than three times. In particular, observation conditions with satellite elevation angles exceeding 30°, near-Earth geometries, and favorable atmospheric conditions can significantly enhance the echo return rate. Based on simulation results, an optimized observation window selection strategy was proposed for “Queqiao” satellite mission planning, providing a universal approach to enhancing the success rate of lunar orbital laser ranging.

     

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