PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-19:12:40
G01     307.4          32.9                9.6 +/-    1.96      15.9 +/-    1.96  0.070 / 0.160
G10     105.6          40.8               12.4 +/-    0.78      17.8 +/-    0.78  0.080 / 0.160
G11     283.5          27.9               11.7 +/-    1.10      21.4 +/-    1.10  0.100 / 0.160
G14     355.7          67.1                9.3 +/-    0.45      10.0 +/-    0.45  0.100 / 0.110
G18     117.5          12.8               11.8 +/-    2.05      30.9 +/-    2.05  0.040 / 0.040
G22     309.5          25.4                9.9 +/-    2.26      19.1 +/-    2.26  0.020 / 0.030
G25     82.5           16.6               11.6 +/-    1.79      27.7 +/-    1.79  0.040 / 0.030
G31     169.1          63.9               13.4 +/-    0.53      14.7 +/-    0.53  0.030 / 0.040
G32     35.3           53.0               10.7 +/-    1.09      13.1 +/-    1.09  0.040 / 0.040