PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/08-12:27:50
G01     115.1          20.7                5.5 +/-    1.33      11.9 +/-    1.33  0.040 / 0.030
G07     91.2           64.0                5.0 +/-    0.86       5.5 +/-    0.86  0.030 / 0.020
G08     43.0           26.2                3.8 +/-    1.67       7.3 +/-    1.67  0.040 / 0.030
G09     174.8          19.6                4.6 +/-    1.96      10.2 +/-    1.96  0.030 / 0.020
G11     99.4           41.3                6.1 +/-    0.85       8.8 +/-    0.85  0.100 / 0.190
G13     315.2          23.1                1.9 +/-    1.96       4.0 +/-    1.96  0.140 / 0.190
G17     202.5          30.1                5.6 +/-    1.01       9.8 +/-    1.01  0.100 / 0.170
G18     89.0           22.3                4.2 +/-    1.02       8.8 +/-    1.02  0.070 / 0.180
G28     300.7          58.8                2.9 +/-    1.10       3.4 +/-    1.10  0.130 / 0.140
G30     351.7          71.4                3.8 +/-    0.92       4.0 +/-    0.92  0.100 / 0.160