PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-08:58:10
G07     48.0           69.5                5.5 +/-    0.33       5.8 +/-    0.33  0.030 / 0.060
G08     51.1           39.6                3.8 +/-    0.79       5.5 +/-    0.79  0.040 / 0.040
G09     174.6          33.9                6.5 +/-    0.97      10.5 +/-    0.97  0.030 / 0.040
G11     119.2          34.3                7.8 +/-    0.76      12.5 +/-    0.76  0.030 / 0.040
G17     199.0          14.1                2.0 +/-    1.59       5.0 +/-    1.59  0.180 / 0.270
G18     104.5          15.6                5.4 +/-    1.16      13.4 +/-    1.16  0.230 / 0.330
G23     161.0          10.5                3.6 +/-    1.84       9.9 +/-    1.84  0.100 / 0.250
G28     271.8          51.0                4.0 +/-    1.16       4.9 +/-    1.16  0.100 / 0.240
G30     328.4          57.4                2.6 +/-    0.84       3.0 +/-    0.84  0.070 / 0.070