PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-17:42:30
G02     24.0           62.9               10.3 +/-    0.50      11.4 +/-    0.50  0.070 / 0.100
G05     157.4          52.2               13.7 +/-    0.48      16.8 +/-    0.48  0.060 / 0.060
G06     49.8           22.6                8.2 +/-    3.97      17.0 +/-    3.97  0.020 / 0.020
G12     216.6          75.5               10.8 +/-    0.71      11.2 +/-    0.71  0.020 / 0.020
G19     94.8           12.9               10.8 +/-    1.73      28.3 +/-    1.73  0.350 / 0.280
G20     197.5          19.2               13.6 +/-    2.59      30.5 +/-    2.59  0.150 / 0.260
G25     304.2          51.0               10.0 +/-    5.06      12.5 +/-    5.06  0.030 / 0.030
G29     303.5          25.4                8.3 +/-    2.61      16.0 +/-    2.61  0.040 / 0.040