PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/05-18:43:10
G01     120.1          17.2               21.7 +/-    1.04      51.1 +/-    1.04  0.080 / 0.240
G07     76.6           67.4               19.9 +/-    0.35      21.4 +/-    0.35  0.100 / 0.270
G08     46.4           35.3               16.3 +/-    0.48      25.8 +/-    0.48  0.070 / 0.130
G09     177.4          27.5               21.4 +/-    1.55      39.5 +/-    1.55  0.080 / 0.110
G11     109.9          39.4               22.1 +/-    0.83      32.5 +/-    0.83  0.040 / 0.070
G13     318.3          18.3               16.1 +/-    2.12      37.0 +/-    2.12  0.040 / 0.090
G17     202.6          20.0               23.2 +/-    2.46      51.0 +/-    2.46  0.040 / 0.060
G18     95.9           20.4               19.9 +/-    0.56      43.3 +/-    0.56  0.040 / 0.050
G28     291.2          57.1               21.5 +/-    0.63      25.1 +/-    0.63  0.020 / 0.050
G30     347.5          68.6               18.4 +/-    0.75      19.6 +/-    0.75  0.020 / 0.040