PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/26-00:28:00
G07     356.2          64.8                6.1 +/-    0.51       6.7 +/-    0.51  0.050 / 0.120
G08     77.2           52.3                6.7 +/-    1.08       8.3 +/-    1.08  0.050 / 0.100
G09     183.2          59.8                9.0 +/-    0.48      10.2 +/-    0.48  0.110 / 0.190
G11     138.3          21.1                8.5 +/-    3.05      18.1 +/-    3.05  0.130 / 0.140
G23     158.8          27.3                8.0 +/-    2.13      14.9 +/-    2.13  0.030 / 0.040
G27     44.2           22.5                4.5 +/-    2.47       9.3 +/-    2.47  0.030 / 0.050
G28     250.1          40.4                8.2 +/-    1.50      11.8 +/-    1.50  0.030 / 0.030
G30     315.9          47.4                6.1 +/-    0.68       8.0 +/-    0.68  0.030 / 0.030