嫦娥四号着陆器月面工作遮挡应对方案研究

嫦娥四号着陆于月球背面南极 艾特肯盆地内，着陆区周围复杂地形导致测控和通信遮挡风险。针对这一问题，开展了着陆区的测控、光照遮挡分析，提出利用轨道控制策略的精细化设计来提高着陆点精度、优化月面工作程序和增加自主控制功能的设计方法,全方面降低嫦娥四号着陆器在月球背面着陆区的生存风险。该方法已通过嫦娥四号着陆器在轨验证，可以为其他深空探测任务提供参考和借鉴。

Study of shielding solution for lunar surface work of Chang’e-4 lander

The target landing site for Chang’e 4 mission is the rugged area of South Pole Aitken(SPA) basin，which is located on the farside of the moon. There are many craters densely distributed in the SPA basin, the uneven topography will result in high risk of sunlight and communication shield when the lander works on lunar surface. Communication and sunlight shield was analyzed. Then, the solution to reduce the lander’s survival risk generated by the shielding was presented in three aspects: to increase the landing precision by optimizing the trajectory control strategy, to optimize the lunar surface operating programme, as well as to add the function of the lander’s autonomus management. The solution has been used in the Chang’e 4 probe successfully, providing reference for future deep space exploration missions.