Table 2: Some error statistics from right surface predictions of all sampling points in Jiulong-Beijing track section from K612+000 to K614+000.

DateError statistic
ME (mm)SD (mm)

Sep. 24−0.00470.14770.9940
Oct. 10−0.00150.09310.9977
Oct. 30−0.00100.09760.9975
Nov. 13 0.0019 0.13780.9949
Dec. 12−0.00340.14860.9943
Dec. 25 0.0005 0.07350.9986