PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/20-10:27:40
G01     118.4          17.1                3.5 +/-    1.60       8.2 +/-    1.60  0.030 / 0.040
G07     83.2           64.7                4.8 +/-    0.96       5.3 +/-    0.96  0.030 / 0.030
G08     46.8           36.1                4.1 +/-    0.87       6.3 +/-    0.87  0.240 / 0.190
G09     176.9          27.2                4.7 +/-    1.98       8.7 +/-    1.98  0.140 / 0.260
G11     108.7          40.7                4.8 +/-    0.86       7.0 +/-    0.86  0.090 / 0.120
G13     317.5          20.0                2.3 +/-    1.73       5.0 +/-    1.73  0.100 / 0.130
G17     201.9          20.3                3.7 +/-    1.95       8.1 +/-    1.95  0.040 / 0.050
G18     94.2           20.6                4.1 +/-    1.30       8.9 +/-    1.30  0.040 / 0.060
G28     282.0          52.4                4.5 +/-    2.14       5.5 +/-    2.14  0.100 / 0.220
G30     344.0          67.9                4.4 +/-    0.89       4.7 +/-    0.89  0.100 / 0.250