PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-13:57:40
G01     116.1          19.8                7.7 +/-    0.97      17.1 +/-    0.97  0.130 / 0.190
G07     91.8           61.8                8.1 +/-    0.84       9.1 +/-    0.84  0.150 / 0.210
G08     43.5           27.1                5.3 +/-    1.57       9.8 +/-    1.57  0.040 / 0.030
G09     175.2          21.5                7.8 +/-    0.77      16.6 +/-    0.77  0.040 / 0.030
G11     99.6           39.2                7.8 +/-    0.86      11.6 +/-    0.86  0.020 / 0.020
G13     317.2          20.0                5.4 +/-    2.09      12.0 +/-    2.09  0.030 / 0.030
G17     201.7          30.0                8.1 +/-    1.68      14.3 +/-    1.68  0.280 / 0.260
G28     298.6          58.3                6.6 +/-    0.70       7.6 +/-    0.70  0.100 / 0.290
G30     347.3          69.1                6.3 +/-    0.96       6.7 +/-    0.96  0.110 / 0.150