PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-17:43:10
G02     54.5           37.1               13.2 +/-    0.82      20.1 +/-    0.82  0.070 / 0.070
G05     76.4           69.2               14.4 +/-    0.59      15.3 +/-    0.59  0.060 / 0.090
G12     187.0          39.7               16.7 +/-    1.71      24.4 +/-    1.71  0.130 / 0.340
G13     134.6          10.8                4.3 +/-   41.63      11.9 +/-   41.63  0.120 / 0.390
G20     204.6          53.1               17.7 +/-    1.51      21.5 +/-    1.51  0.040 / 0.060
G21     266.6          14.9               16.0 +/-    1.40      39.8 +/-    1.40  0.040 / 0.060
G25     242.4          55.5               16.6 +/-    1.08      19.6 +/-    1.08  0.030 / 0.040
G29     327.6          53.0               12.3 +/-    1.08      14.9 +/-    1.08  0.020 / 0.040