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中文摘要：
火星大气进入过程的自主导航性能是影响火星着陆能力的重要因素之一．在此期间，导航方法的设计面临着可用敏感器少、环境气动等参数不确定大的困难．对火星进入过程中几种可用的自主导航方法的原理进行了阐述，探讨了其中的关键技术和研究现状，并对这些导航方法的优缺点进行了对比．针对当前进入段自主导航方式的不足，对如何提高火星进入段自主导航性能的手段进行了探讨．
英文摘要：
The autonomous navigation performance during the mars atmospheric entry is one of the key factors to affect the capability of mars landing. During this phase, since few types of navigation sensors are available and large uncertainties exist in environment and aerodynamic parameters, the design of the autonomous navigation method is complicated. In this paper, the principles of current mars entry navigation methods are summarized and their advantages and disadvantages are compared. With respect to these disadvantages, the methods that can improve the navigation performance are also discussed.
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