PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-14:57:20
G02     226.6          69.1               12.9 +/-    1.17      13.7 +/-    1.17  0.030 / 0.060
G06     44.0           66.7                9.5 +/-    0.66      10.2 +/-    0.66  0.050 / 0.050
G12     321.0          44.9                8.1 +/-    1.11      11.0 +/-    1.11  0.060 / 0.150
G17     67.2           24.1               10.7 +/-    1.54      21.3 +/-    1.54  0.050 / 0.180
G19     52.3           41.2                7.1 +/-    1.47      10.1 +/-    1.47  0.080 / 0.110
G24     254.9          38.3                8.8 +/-    3.37      13.1 +/-    3.37  0.100 / 0.090