嫦娥一号绕月卫星对月球重力场模型的优化  

Optimization on lunar gravity field model using Chang'E-1 orbital tracking data

作　　者：鄢建国[1,2,3] 平劲松[2,4] KOJI Matsumoto SANDER Goossens 唐歌实[4] 李斐[1] 刘俊泽[4] 李金岭[2] 

机构地区：[1]武汉大学测绘遥感信息工程国家重点实验室,武汉430070 [2]中国科学院上海天文台,上海200030 [3]日本国立天文台RISE项目组 [4]北京航天指挥控制中心飞行动力学重点实验室,北京100094

出　　处：《中国科学：物理学、力学、天文学》2011年第7期870-878,共9页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(批准号:40974014;10973031;40904006);国家高技术研究发展计划(编号:2008AA12A210;2009AA122206)资助项目

摘　　要：月球重力场是揭示月球内部结构和物质组成的重要信息,探测月球重力场仍然是绕月探测任务中的重要科学目标之一.在已有月球重力场模型基础上,利用嫦娥一号探测数据,并结合"月女神"一号探测器、月球勘察者(LP)及早期月球探测器轨道跟踪数据,本文解算得到了高精度月球重力场模型CEGM02(100阶次),在CEGM01月球重力场模型基础上对模型进行了优化.对新模型的分析结果表明,嫦娥一号卫星轨道跟踪数据的融入,使得对月球重力场长波长部分的解算精度有显著提高,相比于SGM100h模型在5阶以内精度提高约2倍,在10阶以内有明显贡献,在20阶内都有贡献.初步判断这是由于嫦娥一号卫星轨道动量轮卸载的频度不足"月女神"的1/4,而同时轨道相对较高所导致.文中结合CEGM02和激光测月观测结果解算了月球平均转动惯量0.393446(±0.000006),对月球内部构造研究提供了更强的约束.Lunar gravity field is important information to reveal lunar internal structure and element composition, as well as one of the key scientific objects of lunar exploration mission. Using Chang＇E-1 orbital tracking data, and in combination with orbital tracking data of SELENE, Lunar Prospector （LP） and historical spacecraft, a high accuracy lunar gravity field model CEGM02 is developed, improvements are shown compared to CEGM01 and other historical models. Analyses show that Chang＇E-1 orbital tracking data contribute to long wavelength of lunar gravity field because of its higher orbit altitude than SELENE main orbiter. When compared CEGM02 with SGM100h, there are improvements by a factor of about 2 below degree 5, significant improvements up to degree 10, and contribution to all coefficients until degree 30. Lunar mean moment of inertia 0.393446 of CEGM02 with lunar laser range results, which can be research. （-＋0.000006） is presented by combining degree 2 coefficients served as a rather strong constraint in lunar internal structure

关 键 词：CEGM02 嫦娥一号 月球重力场模型 功率谱 转动惯量 

分 类 号：V476.3[航空宇航科学与技术—飞行器设计]