PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/16-14:13:10
G01     110.1          23.9               10.2 +/-    1.96      20.6 +/-    1.96  0.020 / 0.040
G07     101.7          60.6                9.1 +/-    1.13      10.2 +/-    1.13  0.030 / 0.030
G08     42.2           22.5                6.2 +/-    0.69      12.9 +/-    0.69  0.030 / 0.050
G09     174.4          15.1               10.3 +/-    1.70      25.4 +/-    1.70  0.050 / 0.070
G11     92.6           42.4                9.9 +/-    1.03      13.8 +/-    1.03  0.100 / 0.220
G13     311.8          26.8                8.7 +/-    1.24      16.4 +/-    1.24  0.110 / 0.230
G17     204.6          34.5                9.8 +/-    1.73      15.7 +/-    1.73  0.030 / 0.040
G18     83.5           23.7                7.3 +/-    0.52      14.8 +/-    0.52  0.030 / 0.040
G28     311.4          60.3                8.6 +/-    0.95       9.7 +/-    0.95  0.040 / 0.100
G30     7.7            75.9                9.0 +/-    0.31       9.2 +/-    0.31  0.040 / 0.110