Abstract:

In order to improve the prediction accuracy of BeiDou satellite clock offset, a module is applied to predict the clock offsets of BeiDou satellites using polynomial and EEMD. And the correctness of the module is verified by GPS data. After removal of trend items, obtaining the time series with different frequencies by decomposed residuals using EEMD. On the linear combination of the prediction value by different module, and the final clock offsets prediction value is combined by prediction value of the trend and the sub-time series. The experiment shows that, the module has achieved a good results in predicting BeiDou satellites clock offsets, and the accuracy increases between 7.3%~43.0% compared with ISU-P.

Key words: clock error prediction, EEMD, ISU-P, robust estimate