PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/07-12:27:50
G01     116.8          19.5                5.6 +/-    1.10      12.5 +/-    1.10  0.030 / 0.030
G07     87.1           65.1                5.8 +/-    0.68       6.4 +/-    0.68  0.030 / 0.030
G08     43.6           27.8                4.1 +/-    1.96       7.5 +/-    1.96  0.040 / 0.030
G09     175.1          21.4                5.0 +/-    1.83      10.7 +/-    1.83  0.040 / 0.030
G11     101.9          40.8                5.1 +/-    0.82       7.3 +/-    0.82  0.150 / 0.310
G13     316.3          21.7                2.7 +/-    2.35       5.7 +/-    2.35  0.150 / 0.160
G17     202.0          28.1                5.9 +/-    1.98      10.8 +/-    1.98  0.150 / 0.200
G18     90.9           21.7                5.2 +/-    1.13      11.1 +/-    1.13  0.130 / 0.180
G28     297.2          58.2                4.4 +/-    0.92       5.0 +/-    0.92  0.130 / 0.180
G30     348.3          69.9                4.3 +/-    0.72       4.6 +/-    0.72  0.150 / 0.180