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Table 4 Improvement rate of various models in the X- and Y-directions of PM

From: Analysis and prediction of polar motion using MSSA method

Method X-direction of PM Y-direction of PM
2016 (%) 2017 (%) 2018 (%) Total (%) 2016 (%) 2017 (%) 2018 (%) Total (%)
LM + MSSA(6) + ARMA 36.94 60.97 53.61 50.51 35.93 68.37 48.60 50.97
LM + MSSA(7) + ARMA 38.59 58.02 53.11 49.91 36.67 67.31 48.64 50.87