PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/17-00:12:30
G07     318.9          52.1                5.6 +/-    0.47       6.9 +/-    0.47  0.280 / 0.170
G08     116.6          47.5                9.5 +/-    0.68      12.3 +/-    0.68  0.110 / 0.170
G09     240.4          82.5                7.4 +/-    0.95       7.4 +/-    0.95  0.040 / 0.050
G16     43.6           17.5                3.8 +/-    3.28       8.8 +/-    3.28  0.040 / 0.040
G23     151.0          52.5                8.9 +/-    0.77      10.9 +/-    0.77  0.030 / 0.050
G27     65.2           35.3                6.3 +/-    1.28       9.9 +/-    1.28  0.030 / 0.050
G28     230.2          21.9                6.9 +/-    2.56      14.6 +/-    2.56  0.230 / 0.340
G30     295.3          31.0                7.1 +/-    1.83      12.2 +/-    1.83  0.170 / 0.470