神经网络在卫星钟差短期预报中的应用研究

本文针对卫星钟差的特点,提出了基于神经网络的卫星钟差短期预报模型,给出了基于径向基函数(RBF)网络进行卫星钟差预测的基本思想、预测模型和实施步骤,并对比分析了神经网络模型与灰色系统理论模型的区别.为验证本文提出的预报模型的可行性和有效性,利用GPS卫星钟差数据进行钟差预报精度分析,并与灰色系统模型进行对比分析.仿真结...

Application of neural network in satellite clock bias short-term prediction

Aiming at the characteristic of satellite clock bias,a prediction model based on artificial neural networks was presented for clock bias short-time prediction in the paper.The basic ideas,prediction models and steps of clock bias forecasting based on radial basis function(RBF) network were discussed respectively.The differences between neural network and other statistical prediction method,such as gray predicting model,were compared respectively.To validate the feasibility and validity of the proposed method,it made a careful precision analysis for satellite clock bias prediction with the performance parameters of GPS satellite clock,and made comparison and analysis with Grey system model and neural network model.The results of simulation showed that the prediction precision of the novel four-stage model based on wavelet analysis and artificial neural networks was more better,could afford high precise satellite clock bias prediction for real-time GPS precise point positioning.