PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-11:43:00
G01     116.8          19.5                2.6 +/-   12.15       5.7 +/-   12.15  0.030 / 0.030
G07     87.2           65.0                2.0 +/-    2.66       2.2 +/-    2.66  0.040 / 0.030
G08     43.4           27.3                0.9 +/-    3.28       1.6 +/-    3.28  0.030 / 0.050
G09     174.9          21.1                2.6 +/-    2.83       5.6 +/-    2.83  0.030 / 0.040
G11     101.6          40.8                4.6 +/-    2.90       6.6 +/-    2.90  0.140 / 0.190
G13     316.2          21.7               -1.7 +/-    5.59      -3.6 +/-    5.59  0.110 / 0.170
G17     201.8          28.6                2.7 +/-    3.37       4.9 +/-    3.37  0.110 / 0.220
G18     90.8           21.7                2.1 +/-    8.16       4.4 +/-    8.16  0.130 / 0.210
G28     297.1          58.2                0.7 +/-    3.50       0.8 +/-    3.50  0.060 / 0.240
G30     347.6          69.7                1.1 +/-    2.06       1.2 +/-    2.06  0.070 / 0.260