PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-18:57:40
G01     88.8           32.2               12.3 +/-    0.94      20.6 +/-    0.94  0.070 / 0.120
G07     126.6          44.9               14.9 +/-    1.05      20.1 +/-    1.05  0.060 / 0.120
G11     68.2           39.9               11.6 +/-    0.51      16.9 +/-    0.51  0.060 / 0.110
G13     293.4          36.2               11.9 +/-    0.97      18.5 +/-    0.97  0.070 / 0.080
G17     216.0          51.6               17.1 +/-    1.42      21.2 +/-    1.42  0.030 / 0.060
G18     63.0           23.8               10.0 +/-    1.14      20.1 +/-    1.14  0.040 / 0.050
G19     215.3          26.7               13.6 +/-    2.32      25.5 +/-    2.32  0.040 / 0.040
G28     351.9          61.6               10.4 +/-    0.79      11.7 +/-    0.79  0.030 / 0.040
G30     109.1          74.4               13.9 +/-    1.06      14.3 +/-    1.06  0.080 / 0.120