| Swarm卫星星载GPS精密定轨方法及精度分析 |
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| 引用本文： | 田英国,郝金明,谢建涛,于合理,陈逸伦.Swarm卫星星载GPS精密定轨方法及精度分析[J].测绘科学技术学报,2016(5):452-457. |
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| 作者姓名： | 田英国 郝金明 谢建涛 于合理 陈逸伦 |
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| 作者单位： | 信息工程大学,河南 郑州 450001;北斗导航应用技术河南省协同创新中心,河南 郑州 450001 |
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| 摘 要： | Swarm星座是ESA的首个用于测量来自地球核心、地幔、地壳、海洋、电离层等区域磁场信息的对地观测卫星星座。而高精度的轨道信息正是其有效利用卫星载荷完成上述任务的前提条件。目前国内关于Swarm卫星精密定轨的研究较少,为此建立并推导了Swarm卫星精密定轨的动力学模型、观测模型以及它们之间的数学关系,详细给出了Swarm卫星精密定轨模型与实现过程。针对Swarm卫星精密定轨中姿态数据的处理问题提出了相应的解决方案。利用Swarm卫星星载GPS实测数据,采用约化动力学定轨方法进行Swarm卫星精密定轨实验。通过轨道衔接点位置差异、与外部精密轨道比较以及SLR验证等精度评定方法分析表明:基于星载GPS的Swarm卫星约化动力学定轨各方向的精度都优于3 cm。
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| 关 键 词： | Swarm卫星 星载GPS 卫星姿态 约化动力学精密定轨 精度分析 |
Swarm Precise Orbit Determination and Accuracy Analysis Using Onboard GPS Data |
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| TIAN Yingguo,HAO Jinming,XIE Jiantao,YU Heli,CHEN Yilun.Swarm Precise Orbit Determination and Accuracy Analysis Using Onboard GPS Data[J].Journal of Zhengzhou Institute of Surveying and Mapping,2016(5):452-457. |
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| Authors: | TIAN Yingguo HAO Jinming XIE Jiantao YU Heli CHEN Yilun |
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| Abstract: | Swarm constellation is ESA' s first earth observation satellite constellation, which is used for measuring the earth' s magnetic field information from earth' s core, the mantle and crust, oceans, ionosphere, et al. The high-precision orbit information is a prerequisite for the effective use of satellite payload to complete the above tasks. The current domestic research on Swarm satellite precise orbit determination is less. The observation model, dynamic model and mathematical relationship between them were established and derivated for Swarm satellite pre-cise orbit. The Swarm satellite precise orbit model and the adopted POD( precise orbit determination) strategy were given in detail. For Swarm satellite attitude data processing in POD, the corresponding solution was proposed. Fi-nally, the reduced-dynamic orbit was generated by the Swarm onboard GPS data. The orbit accuracy was analyzed by evaluating the discontinuities positional difference, comparing with an external precise orbit and using SLR eval-uation. The results show that the Swarm reduced-dynamic orbit accuracy can be better than 3 cm. |
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| Keywords: | Swarm satellite spaceborne GPS satellite attitude reduced dynamics precise orbit determination accuracy analysis |
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