PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/09-21:57:10
G02     43.5           46.6                7.1 +/-    0.64       9.3 +/-    0.64  0.030 / 0.030
G05     105.0          69.2                8.4 +/-    1.13       8.9 +/-    1.13  0.030 / 0.030
G12     186.5          51.1               10.7 +/-    0.43      13.4 +/-    0.43  0.030 / 0.040
G25     272.6          58.5                3.0 +/-    1.55       3.5 +/-    1.55  0.040 / 0.040
G29     315.5          36.8                8.1 +/-    1.46      12.5 +/-    1.46  0.040 / 0.050