PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-15:27:40
G02     234.2          72.9                9.2 +/-    0.93       9.6 +/-    0.93  0.050 / 0.100
G05     175.7          11.5                7.3 +/-   19.96      19.8 +/-   19.96  0.050 / 0.120
G06     41.5           62.1                8.1 +/-    0.63       9.1 +/-    0.63  0.030 / 0.070
G12     321.5          49.3                8.8 +/-    0.92      11.2 +/-    0.92  0.030 / 0.060
G17     70.7           21.5                7.4 +/-    1.70      15.7 +/-    1.70  0.180 / 0.280
G19     56.7           38.4                8.0 +/-    0.47      11.9 +/-    0.47  0.100 / 0.250
G24     249.8          36.3                9.8 +/-    0.68      15.2 +/-    0.68  0.120 / 0.300
G25     316.5          13.0                7.9 +/-    2.20      20.5 +/-    2.20  0.100 / 0.300