PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/26-19:57:50
G02     50.1           41.4               15.2 +/-    0.39      21.6 +/-    0.39  0.060 / 0.060
G05     93.5           71.6               16.5 +/-    0.82      17.3 +/-    0.82  0.050 / 0.080
G12     187.2          43.5               17.9 +/-    1.06      24.6 +/-    1.06  0.060 / 0.060
G20     202.5          49.6               20.6 +/-    0.71      26.1 +/-    0.71  0.060 / 0.050
G21     263.1          11.4               15.8 +/-    3.85      42.8 +/-    3.85  0.170 / 0.540
G25     247.0          57.7               17.5 +/-    0.67      20.3 +/-    0.67  0.190 / 0.600
G29     323.4          47.8               15.3 +/-    0.59      19.8 +/-    0.59  0.020 / 0.040