PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-21:12:50
G01     86.6           32.6               10.3 +/-    0.81      17.2 +/-    0.81  0.220 / 0.120
G07     128.2          43.3               14.0 +/-    0.79      19.4 +/-    0.79  0.270 / 0.120
G11     66.9           39.6               11.2 +/-    1.05      16.4 +/-    1.05  0.050 / 0.030
G13     291.4          36.6               11.3 +/-    1.98      17.4 +/-    1.98  0.070 / 0.040
G15     313.1          11.4               -1.4 +/-   24.03      -3.9 +/-   24.03  0.100 / 0.180
G17     217.7          51.7               13.3 +/-    1.33      16.4 +/-    1.33  0.110 / 0.180
G18     61.2           23.4                9.6 +/-    1.25      19.5 +/-    1.25  0.030 / 0.010
G19     216.2          29.2               14.6 +/-    1.52      26.0 +/-    1.52  0.030 / 0.010
G28     356.1          61.4               11.2 +/-    1.05      12.5 +/-    1.05  0.050 / 0.020
G30     115.3          71.8               12.6 +/-    0.83      13.2 +/-    0.83  0.040 / 0.030