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

Date Error statistic ME (mm) SD (mm) Sep. 24 −0.0047 0.1477 0.9940 Oct. 10 −0.0015 0.0931 0.9977 Oct. 30 −0.0010 0.0976 0.9975 Nov. 13 0.0019 0.1378 0.9949 Dec. 12 −0.0034 0.1486 0.9943 Dec. 25 0.0005 0.0735 0.9986