PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-13:27:40
G03     240.8          69.3                7.6 +/-    0.64       8.1 +/-    0.64  0.130 / 0.180
G09     301.9          16.2                4.6 +/-    1.33      11.0 +/-    1.33  0.100 / 0.230
G14     96.3           19.8                6.9 +/-    1.55      15.2 +/-    1.55  0.060 / 0.040
G16     127.7          57.6                8.3 +/-    0.32       9.7 +/-    0.32  0.060 / 0.040
G22     190.4          54.8                8.0 +/-    0.39       9.5 +/-    0.39  0.050 / 0.030
G23     321.2          51.3                7.6 +/-    1.16       9.4 +/-    1.16  0.040 / 0.040
G26     70.5           51.3                6.9 +/-    0.81       8.6 +/-    0.81  0.030 / 0.050
G31     51.7           19.5                5.8 +/-    1.43      13.0 +/-    1.43  0.040 / 0.040