| 一种导航卫星中长期轨道预报方法 |
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| 引用本文： | 周建华,杨龙,徐波,谢廷峰.一种导航卫星中长期轨道预报方法[J].测绘学报,2011(Z1). |
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| 作者姓名： | 周建华 杨龙 徐波 谢廷峰 |
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| 作者单位： | 北京环球信息应用开发中心;南京航空航天大学; |
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| 摘 要： | 基于神经网络混合建模的思想提出一种针对导航卫星的中长期轨道预报方法,在原动力学模型的基础上引入神经网络模型作为补偿,从而获得新的预报模型。在训练过程中神经网络通过学习动力学模型轨道预报误差来掌握其变化规律,并在预报过程中为动力学模型预报提供补偿,以提高预报精度。对GPS卫星动力学模型中长期预报误差的特点进行分析,然后根据所得结论提出混合模型的中长期(15 d以上)预报方案,最后通过对GPS卫星的仿真试验证明混合模型的改进效果,结果表明新方法在15~40 d的预报上表现出很好的改进效果。
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| 关 键 词： | 轨道预报 神经网络 动力学模型 混合建模 |
A Long Duration Orbit Prediction Method for Navigation Satellite |
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| ZHOU Jianhua ,YANG Long,XU Bo,XIE Tingfeng.A Long Duration Orbit Prediction Method for Navigation Satellite[J].Acta Geodaetica et Cartographica Sinica,2011(Z1). |
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| Authors: | ZHOU Jianhua YANG Long XU Bo XIE Tingfeng |
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| Institution: | ZHOU Jianhua 1,YANG Long1,XU Bo2,XIE Tingfeng1 1.Beijing Global Information Application and Development Center,Beijing 100094,China,2.Nanjing University of Aeronautics and Astronautics,Nanjing 210016 |
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| Abstract: | A hybrid prediction model based on neural network is introduced for navigation satellite.The new model is based on dynamical model and the neural network model is adopted to modify it.During the training phase,neural network model tries to approach the difference of dynamical model prediction product,then compensate it in the prediction phase.The characteristics of DMM prediction error for GPS are explored,and then predition strategy for long term(longer than 15 d) is designed.At the last,a group of tests o... |
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| Keywords: | orbit prediction artificial neural network dynamical model hybrid model |
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