PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-20:12:30
G02     290.0          80.0               10.7 +/-    0.43      10.8 +/-    0.43  0.030 / 0.030
G05     169.1          26.6               14.2 +/-    2.47      26.7 +/-    2.47  0.040 / 0.020
G06     41.0           44.3                8.9 +/-    0.92      12.1 +/-    0.92  0.130 / 0.110
G12     316.8          68.0               10.1 +/-    0.61      10.8 +/-    0.61  0.090 / 0.110
G17     83.8           11.8                9.9 +/-    1.35      26.4 +/-    1.35  0.040 / 0.030
G19     72.2           28.4                9.6 +/-    1.98      17.3 +/-    1.98  0.030 / 0.040
G24     233.9          26.7               12.6 +/-    1.25      23.8 +/-    1.25  0.150 / 0.110
G25     317.5          28.9                8.9 +/-    1.18      16.0 +/-    1.18  0.110 / 0.130