INFLUENCE ON SHORT-TERM PREDICTION ACCURACY OF POLAR
MOTION BY EI Nio EVENT
1)School of Geology Engineering and Surveying , Chang’an University , Xi’an 710054
2)Aerors Inc,Xi’an 710100
3）State Key Laboratory of Geoinformation Engineering, Xi’an 710054
4)Xi’an Research Institute of Surveying and Mapping, Xi’an 710054
Abstract：In order to reduce the influence of EI Nio event on polar motion prediction, the length selection of polar motion fitting series are studied for polar motion prediction. The results show that the accuracy of polar motion prediction can be improved in the time of EI Nio by extending the length of polar motion fitting series to 17-19 years.
