PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-08:42:40
G03     252.2          69.4                7.6 +/-    1.21       8.1 +/-    1.21  0.030 / 0.040
G09     301.9          17.2                5.5 +/-    2.35      13.0 +/-    2.35  0.030 / 0.040
G14     96.0           18.7                3.9 +/-    1.93       8.8 +/-    1.93  0.120 / 0.220
G16     128.1          56.8                8.1 +/-    0.53       9.5 +/-    0.53  0.090 / 0.220
G22     197.3          58.8                8.2 +/-    0.50       9.4 +/-    0.50  0.040 / 0.050
G23     317.2          47.1                6.6 +/-    1.31       8.6 +/-    1.31  0.040 / 0.060
G26     72.2           51.6                7.3 +/-    0.63       9.1 +/-    0.63  0.040 / 0.040
G31     51.1           20.3                4.2 +/-    3.64       9.1 +/-    3.64  0.030 / 0.050