Application of CLS+AR Model Polar Motion to Prediction Based on Time-Varying Parameters Correction of Chandler Wobble

According to the time variant characteristic of Chandler wobble(CW) in LS model,we put forward a new CLS model based on correction of time variant parameters of the CW.We use the CLS+AR model to predict polar motion.The model-building is discussed in detail,and the prediction accuracy of CLS+AR model is compared with LS+AR model and other models.The results show significant improvement of the prediction accuracy of the CLS+AR model in comparison with the LS+AR model,and this proves the effectiveness and the superiority of the new model.