国内外深空探测器精密定轨软件研究综述及WUDOGS简介

深空探测器精密定轨软件系统的研制在深空探测活动中是一个非常重要的环节,一直受到各大航天机构的重视。针对国内外深空探测器精密定轨软件平台的研究现状,重点介绍了具有代表性的美国JPL(Jet Propulsion Laboratory,喷气推进实验室)的DPTRAJ/ODP(Double Precision TRAJectory program/Orbit Determination Program,双精度轨道程序/定轨程序)和MONTE(Mission analysis,Operations,and Navigation Toolkit Environment,任务分析、操作和导航工具箱环境),GSFC(Goddard Space Flight Center,戈达德航天飞行中心)的GEODYN-II以及法国CNES(Centre National dEtudes Spatiales,国家空间研究中心)的GINS(Géodésie par Intégrations Numériques Simultanées,同步数值积分大地测量)软件系统,对这些软件的结构与功能进行了总结。之后对武汉大学自主研制的深空探测器精密定轨软件系统WUDOGS(Wuhan University Deep space Orbit determination and Gravity recovery System,武汉大学深空探测器精密定轨与重力场解算软件系统)的主要模块与功能进行了介绍,通过与GEODYN-II的交叉对比验证,表明:对于探测器的轨道预报,WUDOGS与GEODYN-II的1个月位置差异小于0.3mm,2d位置差值小于5×10~(-3) mm;双程测距、双程测速的理论计算值和GEODYN-II的差值RMS(Root Mean Square,均方根)分别在0.06mm,0.002mm/s的水平;WUDOGS目前已初步具备了月球和火星探测器精密定轨能力。最后对WUDOGS的下一步发展方向进行了展望。

Review of Deep Space Orbit Determination Software and Introduction to WUDOGS

The development of deep spacecraft precise orbit determination software is a significant aspect in deep space exploration activities and has been of great importance to major space agencies.We review the research status of deep spacecraft precise orbit determination software platforms at home and abroad, mainly introduce Jet Propulsion Laboratory(JPL) Double Precision TRAJectory program/ Orbit Determination Program(DPTRAJ/ODP) and Mission analysis, Operations, and Navigation Toolkit Environment(MONTE), Goddard Space Flight Center(GSFC) GEODYN-II, Centre National d''Etudes Spatiales''s(CNES) Géodésie par Intégrations Numériques Simultanées(GINS), and then summarize their structure and function.Then, we briefly introduce Wuhan University Deep space Orbit determination and Gravity recovery System(WUDOGS) main modules and functions.Cross verification tests between WUDOGS and GEODYN-II show that for orbit prediction, orbit difference is less than 0.3 mm with one month arc, 5×10-3 mm with two days arc; the difference root mean square of computed values of observables for two-way range and two-way range rate is at levels of 0.06 mm and 0.002 mm/s respectively; WUDOGS now has preliminary capability for lunar and Martian spacecraft precise orbit determination.Finally, future development of WUDOGS is discussed