PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-20:43:00
G01     87.3           32.4               12.1 +/-    1.33      20.1 +/-    1.33  0.070 / 0.110
G07     127.7          43.9               16.0 +/-    0.86      22.0 +/-    0.86  0.080 / 0.130
G11     67.4           39.8               13.0 +/-    1.16      18.9 +/-    1.16  0.110 / 0.210
G13     292.1          36.5               12.6 +/-    1.96      19.4 +/-    1.96  0.200 / 0.190
G15     313.6          11.1               -2.8 +/-   21.42      -7.7 +/-   21.42  0.070 / 0.100
G17     217.1          51.4               17.4 +/-    1.34      21.5 +/-    1.34  0.070 / 0.110
G18     61.8           23.6               11.0 +/-    0.76      22.2 +/-    0.76  0.020 / 0.030
G19     215.9          28.4               18.5 +/-    1.28      33.4 +/-    1.28  0.030 / 0.030
G28     354.7          61.5               13.5 +/-    0.73      15.1 +/-    0.73  0.030 / 0.060
G30     113.5          72.6               15.9 +/-    0.85      16.5 +/-    0.85  0.040 / 0.050