%0 Journal Article %T 基于新近重力场模型MRO120D的火星探测器轨道仿真与分析<br>Simulation and Analysis of Martian Explorer Orbits Based on the New Gravity Field Model MRO120D %A 钟振 %A 刘子恒< %A br> %A ZHONG Zhen %A LIU Zi-heng %J 西南大学学报(自然科学版) %D 2018 %R 10.13718/j.cnki.xdzk.2018.05.021 %X 针对火星探测器在轨运行时间的问题，利用动力学方法和最新火星重力场模型MRO120D，对220 km和150 km初始轨道高度的火星探测器进行轨道仿真分析.结果表明，考虑重力场模型二阶位系数<i>C</i><sub>20</sub>时，探测器在220 km轨道高度能够在计算时间内长期稳定地运行，不考虑该系数的探测器在轨运行时间不足40 d，说明位系数<i>C</i><sub>20</sub>是稳定轨道的重要因素.在相同条件下，探测器在150 km轨道高度运行时间不足18 d，说明大气阻力效应对低轨探测器的影响较大.在满足相关科学任务的条件下，建议初始轨道设计在220 km以上，以此获得较长的在轨运行时间.<br>To understand the influence of Mars probe orbit on its orbiting time, this paper makes simulation and analysis of the orbit of a Mars probe with a preliminary orbit height of 220 or 150 km, using a dynamic method and the recent Martian gravity filed model MRO120D. The results show that the probe that considers the two-order coefficient <i>C</i><sub>20</sub> of the gravity field model runs stably in the set cycle of orbiting time at a height of 220 km and that the probe with no consideration of <i>C</i><sub>20</sub> stays on the orbit for only 40 days, indicating a crucial role of <i>C</i><sub>20</sub> in orbiting time. With the same method and data, the probe with a height of 150 km lasts less than 18 days. This result indicates that Martian atmosphere has a major effect on low Mars satellites. In order for a probe to orbit for a long time, we propose a height of more than 220 km for Mars satellites when other scientific objectives are satisfied %K 火星重力场 %K 扁率摄动 %K 大气阻力 %K 火星探测器 %K 在轨时间< %K br> %K Martian gravity field %K oblateness perturbation %K atmospherical drag %K Mars spacecraft %K orbiting time %U http://xbgjxt.swu.edu.cn/jsuns/html/jsuns/2018/5/201805021.htm