Table 1: Some error statistics from gauge predictions of all sampling points in Jiulong-Beijing track section from K612+000 to K614+000.

DateError statistic
ME (mm)SD (mm)

Sep. 24−0.00180.19120.9884
Oct. 10−0.00190.06600.9985
Oct. 30−0.00130.30070.9690
Nov. 13−0.00220.10620.9960
Dec. 12−0.00270.14810.9921
Dec. 250.00010.10300.9961