PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-15:28:10
G02     239.7          74.9                9.9 +/-    0.31      10.2 +/-    0.31  0.140 / 0.420
G05     174.8          13.5               11.0 +/-    4.29      28.4 +/-    4.29  0.110 / 0.250
G06     40.7           59.8                8.7 +/-    0.52       9.9 +/-    0.52  0.040 / 0.040
G12     321.5          51.6                9.5 +/-    0.79      11.7 +/-    0.79  0.030 / 0.040
G17     72.6           20.1                7.8 +/-    1.93      17.2 +/-    1.93  0.140 / 0.090
G19     59.0           37.0                7.8 +/-    0.85      11.9 +/-    0.85  0.110 / 0.130
G24     247.3          35.1               11.4 +/-    2.20      18.0 +/-    2.20  0.090 / 0.160
G25     316.9          15.0                6.8 +/-    1.92      16.8 +/-    1.92  0.080 / 0.180