PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-18:42:20
G02     47.2           43.7               16.2 +/-    1.07      22.2 +/-    1.07  0.030 / 0.040
G05     107.8          71.4               18.5 +/-    0.63      19.4 +/-    0.63  0.040 / 0.040
G12     188.9          48.6               17.1 +/-    1.10      21.9 +/-    1.10  0.040 / 0.050
G20     201.5          44.6               18.5 +/-    0.67      25.1 +/-    0.67  0.040 / 0.050
G25     257.3          59.2               16.9 +/-    1.73      19.3 +/-    1.73  0.040 / 0.080
G29     321.0          44.7               15.6 +/-    0.63      21.1 +/-    0.63  0.060 / 0.080