PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-15:27:50
G01     41.1           16.6                8.3 +/-    2.99      20.0 +/-    2.99  0.290 / 0.280
G13     237.6          23.5               10.0 +/-    1.73      20.3 +/-    1.73  0.210 / 0.240
G15     272.0          12.6                8.2 +/-    2.03      21.6 +/-    2.03  0.020 / 0.030
G17     348.9          73.3                9.4 +/-    0.31       9.8 +/-    0.31  0.030 / 0.030
G19     274.8          69.6                9.2 +/-    0.43       9.8 +/-    0.43  0.040 / 0.070
G24     316.9          17.5                8.6 +/-    2.63      20.0 +/-    2.63  0.060 / 0.060
G28     62.9           51.9                9.1 +/-    0.94      11.2 +/-    0.94  0.040 / 0.040
G30     153.9          28.0               10.3 +/-    1.60      18.9 +/-    1.60  0.040 / 0.050