PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-17:57:50
G02     223.9          64.9               12.3 +/-    1.14      13.4 +/-    1.14  0.040 / 0.070
G06     45.5           66.9                8.7 +/-    1.18       9.3 +/-    1.18  0.050 / 0.050
G12     321.0          44.4               10.0 +/-    1.81      13.5 +/-    1.81  0.050 / 0.090
G17     65.9           25.0                8.3 +/-    1.14      16.2 +/-    1.14  0.060 / 0.090
G19     50.7           42.2                7.9 +/-    0.78      11.1 +/-    0.78  0.060 / 0.130
G24     257.3          39.2               12.8 +/-    1.08      18.8 +/-    1.08  0.060 / 0.110