PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/22-16:42:30
G02     38.1           51.3                7.7 +/-    0.67       9.6 +/-    0.67  0.030 / 0.050
G05     126.3          68.4                7.3 +/-    0.63       7.8 +/-    0.63  0.040 / 0.040
G12     187.4          55.1                7.7 +/-    0.59       9.2 +/-    0.59  0.020 / 0.030
G25     276.1          59.2                4.7 +/-    1.55       5.4 +/-    1.55  0.030 / 0.020
G29     313.5          34.5                5.0 +/-    1.40       8.0 +/-    1.40  0.040 / 0.040