PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-14:58:10
G01     319.7          16.0                4.8 +/-    1.76      11.5 +/-    1.76  0.050 / 0.050
G08     261.9          14.2                6.0 +/-    1.56      15.3 +/-    1.56  0.050 / 0.090
G10     75.9           54.8                6.5 +/-    0.48       7.7 +/-    0.48  0.030 / 0.040
G11     307.2          20.0                6.0 +/-    0.81      13.1 +/-    0.81  0.040 / 0.050
G14     286.5          69.0                6.4 +/-    0.69       6.8 +/-    0.69  0.030 / 0.030
G31     176.0          40.3                9.6 +/-    1.32      13.9 +/-    1.32  0.030 / 0.030
G32     4.8            68.5                5.7 +/-    0.43       6.1 +/-    0.43  0.130 / 0.290