日地L1点探测任务设计与结果分析

日地L1点是太阳观测任务的理想观测点，对于中国后续太阳观测任务具有重要意义，因此在嫦娥五号的拓展任务阶段设计并实施了中国首次日地L1点探测任务，通过在轨飞行验证了日地L1点转移轨道、环绕轨道设计的正确性，对日地L1点的测控链路环境、太阳辐照环境、三体动力学环境、空间辐射环境等飞行环境进行了探测和验证。轨道飞行和各项环境探测的结果与设计模型的预示结果之间比对一致性较好，通过在轨飞行数据验证了设计模型的正确性。各项试验获得了预期的技术成果，进一步丰富了嫦娥五号任务的成果产出，对中国后续深空探测任务和产品的设计具有重要借鉴意义。

Design and result analysis of the Sun-Earth L1 point exploration

The Sun-Earth L1 point is an optimal location for the Sun observation and is significant for the future Sun observation missions of China. Therefore, the first domestic exploration mission on the Sun-Earth L1 point was designed and implemented during the extended phase of the Chang’E-5 mission. By this flight, the design of the orbit transferring and orbiting around the Sun-Earth L1 point was verified, and the flight environments of the Sun-Earth L1 point such as the TT&C environment, the solar irradiance environment, the three-body dynamics environment and the space radiation environment were detected and verified. The results of orbit flight and environment detection were consistent with the predicted results of the design model and therefore the correctness of the design model was verified with on orbit flight data. Technological achievements, which were important references for the design of deep-space exploration missions and devices in the future, were acquired as expected and further enriched the outcome of the Chang’E-5 mission.