摘要
与月球中低纬度着陆区不同，月球南极地区地形地貌条件较为恶劣，太阳高度角低，对地可见与不可见周期较长，这些关键特性都对南极着陆探测任务提出了挑战。文章结合国内外已开展的研究工作，对南极地区的光照条件、对地可见、地形地貌等方面进行了分析和总结，得到了上述关键特性的规律。南极地区不存在永久光照区，但存在一些几百米尺度的4～9个月的准连续光照区，着陆器的光照条件与着陆器高度密切关联；南极地区光照条件和对地可见受地形影响较大；在50m基线情况下，备选着陆区域平均坡度比较平缓（0°～5°）；着陆器尺度5m基线情况下，不同备选着陆区域平均坡度相差较大，最大平均坡度可以达到25°。根据上述分析，对我国开展月球南极探测的任务规划和探测器系统设计提出了建议，主要包括着陆区的选择及探测器主要功能组成等。
Compared to the landing areas in low and middle lunar latitudes, the lunar south pole region for landing has special characteristics. In the south pole, the craters are large and densely distributed and the low sun elevation angle and the long earth visibility cycle, which presents a challenge to landing mission. The paper describes the characteristics of lunar south pole explora- tion, which include illumination, earth visibility and lunar terrain. The preliminary results show that the areas with quasi-continuous illumination of 4~9 months exist, but their sizes are small （a few hundred meters） ~ the illumination condition depends on the height of the lander~ the illu- mination condition and earth visibility condition are depend on terrain~ 50m slopes are found to be shallow （0°~5°）, whereas at the scale of the lander footprint （Sin） the slopes in each areas are very different, and the maximum slope is about 25°. Based on the analysis, the paper offers a proposal on a Chinese mission planning and probe system design, including the landing site choice and the main function specifications of the probe.
出处
《航天器工程》
北大核心
2015年第1期103-110,共8页
Spacecraft Engineering
基金
国家重大科技专项工程
关键词
月球南极着陆
软着陆
光照条件
对地可见
地形地貌
lunar south pole landing
soft landing
illumination condition
earth visibility
terrain
