PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-05:12:50
G01     319.8          15.7               -1.1 +/-   25.19      -2.6 +/-   25.19  0.170 / 0.240
G08     259.9          14.4                9.4 +/-    1.98      23.6 +/-    1.98  0.210 / 0.190
G10     75.7           54.5                5.4 +/-    0.53       6.5 +/-    0.53  0.120 / 0.250
G11     305.3          21.9                7.4 +/-    1.83      15.6 +/-    1.83  0.100 / 0.250
G14     283.1          68.2                7.7 +/-    0.46       8.2 +/-    0.46  0.040 / 0.050
G18     307.0          38.2                5.5 +/-    1.47       8.3 +/-    1.47  0.030 / 0.040
G20     97.8           42.1               11.3 +/-    0.94      15.9 +/-    0.94  0.180 / 0.300
G31     174.6          41.1                7.7 +/-    0.83      11.0 +/-    0.83  0.150 / 0.400
G32     6.9            68.2                6.0 +/-    0.50       6.4 +/-    0.50  0.080 / 0.070