应用天文研究组知识库

首先通过对鹊桥卫星任务轨道进行分析,用数值方法模拟出一条近似鹊桥卫星探测任务的轨道,然后计算了2019年下半年云南天文台鹊桥卫星激光测距观测时间窗口,给出了鹊桥卫星到云南天文台的激光测距距离范围和鹊桥卫星运行轨道与月球的最小距离。基于模拟的晕轨道计算了鹊桥卫星激光测距单脉冲理论回波光子数和测距成功概率。根据月球激光测距积累的经验,结合影响测距的因素给出了提高激光测距回波光子数和测距成功率的改善方法。最后设计了等效试验方案,通过实测结果来验证理论计算,为实现鹊桥卫星激光测距提供依据。 

Firstly, the orbit of the Magpie bridge satellite is analyzed, and the orbit of the Magpie bridge satellite mission is given by numerical method. Then, the time window of the satellite laser ranging observation of the Yunnan Observatory in the second half of 2019 is calculated. The laser ranging distance range from the Magpie bridge satellite to the Yunnan Observatory and the minimum distance between the orbit of the Magpie bridge satellite and the moon are given. The theoretical number of echo photons and the probability of ranging success of the Magpie bridge laser ranging are calculated. According to accumulated experience on lunar laser ranging, combined with the factors affecting the ranging, an improved method for improving the number of laser ranging echoes and the success rate of ranging is given. Finally, an equivalent test plan is designed to verify the theoretical calculation through the measured results.