PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/08-16:28:10
G02     237.5          73.7                9.1 +/-    0.48       9.5 +/-    0.48  0.170 / 0.420
G05     175.7          12.4               15.0 +/-    3.13      39.8 +/-    3.13  0.110 / 0.220
G06     41.0           59.8                9.1 +/-    0.89      10.3 +/-    0.89  0.040 / 0.050
G12     321.6          51.4                9.9 +/-    0.47      12.3 +/-    0.47  0.030 / 0.040
G17     72.2           20.3                7.6 +/-    1.57      16.5 +/-    1.57  0.130 / 0.290
G19     58.4           37.3                8.3 +/-    1.08      12.7 +/-    1.08  0.180 / 0.280
G24     248.0          35.5                9.3 +/-    2.06      14.6 +/-    2.06  0.040 / 0.030
G25     316.8          15.0                7.2 +/-    3.40      17.9 +/-    3.40  0.050 / 0.030