PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-16:27:30
G02     54.1           37.2                8.5 +/-    0.37      12.9 +/-    0.37  0.020 / 0.040
G05     77.4           68.9                9.9 +/-    0.38      10.6 +/-    0.38  0.020 / 0.040
G12     187.6          41.2               11.2 +/-    1.05      15.9 +/-    1.05  0.030 / 0.080
G13     135.2          10.1               -9.0 +/-    9.48     -24.9 +/-    9.48  0.040 / 0.060
G20     204.5          51.4               11.3 +/-    2.47      14.0 +/-    2.47  0.130 / 0.270
G21     266.1          14.9               11.3 +/-    1.90      28.1 +/-    1.90  0.110 / 0.290
G25     245.6          56.1               11.6 +/-    0.68      13.7 +/-    0.68  0.080 / 0.070
G29     327.7          52.9                7.5 +/-    1.19       9.2 +/-    1.19  0.060 / 0.060