PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-02:57:20
G02     50.2           40.2                6.5 +/-    1.58       9.4 +/-    1.58  0.040 / 0.020
G05     82.8           67.8                7.4 +/-    0.50       7.9 +/-    0.50  0.050 / 0.020
G12     187.8          46.5               11.4 +/-    0.83      15.1 +/-    0.83  0.030 / 0.010
G20     213.0          12.1                5.0 +/-   28.96      13.3 +/-   28.96  0.030 / 0.010
G25     261.5          57.7               11.1 +/-    1.09      12.8 +/-    1.09  0.200 / 0.480
G29     319.8          42.6                9.7 +/-    0.63      13.6 +/-    0.63  0.200 / 0.580