PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-17:27:40
G02     22.7           63.8               12.2 +/-    4.20      13.5 +/-    4.20  0.030 / 0.040
G05     158.1          51.1               15.5 +/-    9.17      19.3 +/-    9.17  0.030 / 0.050
G06     49.2           23.7               10.1 +/-    2.08      20.3 +/-    2.08  0.050 / 0.070
G12     221.3          76.6               10.8 +/-    3.50      11.1 +/-    3.50  0.050 / 0.070
G19     93.8           13.6               13.8 +/-    3.82      35.4 +/-    3.82  0.030 / 0.040
G20     197.5          18.0               19.6 +/-    3.97      45.3 +/-    3.97  0.030 / 0.040
G25     305.6          49.9               14.1 +/-    3.42      17.7 +/-    3.42  0.110 / 0.150
G29     302.7          24.7               11.8 +/-    2.86      23.2 +/-    2.86  0.100 / 0.170