PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/08-21:57:30
G02     42.0           47.9                8.6 +/-    0.77      11.2 +/-    0.77  0.030 / 0.050
G05     110.7          68.8                9.2 +/-    0.60       9.8 +/-    0.60  0.040 / 0.050
G12     187.1          53.2               11.0 +/-    0.88      13.4 +/-    0.88  0.030 / 0.030
G25     276.5          58.2                5.8 +/-    1.43       6.7 +/-    1.43  0.030 / 0.030
G29     314.3          35.4                8.8 +/-    1.02      13.9 +/-    1.02  0.030 / 0.040