PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/12-21:27:50
G01     87.3           32.4               11.7 +/-    1.54      19.4 +/-    1.54  0.150 / 0.210
G07     127.7          43.9               14.9 +/-    0.81      20.4 +/-    0.81  0.060 / 0.090
G11     67.8           40.0               11.8 +/-    1.33      17.2 +/-    1.33  0.060 / 0.090
G13     292.2          36.4               12.2 +/-    2.50      18.9 +/-    2.50  0.030 / 0.050
G15     313.5          11.2               -8.3 +/-    8.41     -22.5 +/-    8.41  0.040 / 0.040
G17     217.2          51.3               15.3 +/-    1.21      19.0 +/-    1.21  0.080 / 0.120
G18     61.9           23.6               10.4 +/-    1.01      21.0 +/-    1.01  0.100 / 0.130
G19     215.9          28.7               15.9 +/-    1.53      28.7 +/-    1.53  0.030 / 0.030
G28     354.9          61.5               12.4 +/-    0.60      13.9 +/-    0.60  0.030 / 0.030
G30     113.9          72.1               14.1 +/-    0.68      14.7 +/-    0.68  0.040 / 0.040