PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/01-20:42:50
G02     50.1           41.2                9.0 +/-    0.49      12.8 +/-    0.49  0.030 / 0.040
G05     79.7           68.2                9.0 +/-    0.50       9.6 +/-    0.50  0.020 / 0.040
G12     183.6          40.7               12.4 +/-    1.62      17.8 +/-    1.62  0.040 / 0.090
G21     263.0          10.0               -4.7 +/-   19.50     -13.1 +/-   19.50  0.060 / 0.070
G25     253.7          57.4                9.4 +/-    0.66      10.9 +/-    0.66  0.050 / 0.050
G29     320.9          43.9                9.3 +/-    0.78      12.7 +/-    0.78  0.040 / 0.050