PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-21:57:40
G02     79.8           17.7                9.7 +/-    0.99      22.5 +/-    0.99  0.060 / 0.140
G05     44.5           40.8               10.5 +/-    0.81      15.0 +/-    0.81  0.060 / 0.130
G13     105.5          31.8               13.0 +/-    1.31      21.9 +/-    1.31  0.140 / 0.410
G15     149.4          33.6               15.4 +/-    0.96      25.1 +/-    0.96  0.150 / 0.480
G18     228.8          23.1               16.0 +/-    2.71      32.7 +/-    2.71  0.080 / 0.130
G20     317.6          86.1               10.4 +/-    0.79      10.4 +/-    0.79  0.070 / 0.160
G21     293.2          33.6                9.7 +/-    1.27      15.9 +/-    1.27  0.020 / 0.030
G25     207.2          26.9               14.6 +/-    1.02      27.4 +/-    1.02  0.020 / 0.030
G26     311.0          15.7                8.7 +/-    1.57      21.2 +/-    1.57  0.030 / 0.050
G29     11.2           84.0               10.6 +/-    0.53      10.7 +/-    0.53  0.040 / 0.070