**Table 1:** The group corrections dt, d $\varphi$ , and dz.
Group	0	2	4	6	8	10	12	14	16	18	20	22	Closing
													error
d $t(0.0001^{\rm s})$	-14	-19	0	2	-9	11	1	5	12	6	12	-7	-16
$\sigma_t(\pm0.0001^{\rm s})$	7	7	7	7	7	7	7	7	7	7	7	7	24
d $\varphi$ (0.001'')	11	-6	-6	20	-15	-16	3	-2	13	9	1	-11	-92
$\sigma_{{\rm d}\varphi}$ ( $\pm$ 0.001'')	10	10	9	9	9	9	9	9	10	10	10	10	33
dz(0.001'')	19	-10	-15	-16	3	3	25	6	-4	6	-7	-10	91
$\sigma_{{\rm d}z}$ ( $\pm$ 0.001'')	7	7	7	7	7	7	6	7	7	7	7	7	24

From Table 1, we can see that the closing error of dz is very small.

Source LaTeX | All tables | In the text