PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-17:12:30
G02     29.8           58.6               11.1 +/-    0.84      12.7 +/-    0.84  0.060 / 0.060
G05     151.8          57.5               13.3 +/-    0.63      15.5 +/-    0.63  0.040 / 0.060
G06     52.1           19.2               10.6 +/-    1.82      23.9 +/-    1.82  0.020 / 0.030
G12     205.3          71.1               11.6 +/-    0.99      12.2 +/-    0.99  0.030 / 0.030
G19     98.7           10.0               12.8 +/-    2.20      35.6 +/-    2.20  0.030 / 0.030
G20     198.0          23.7               11.9 +/-    2.78      23.9 +/-    2.78  0.030 / 0.030
G25     298.3          54.1               10.6 +/-    2.81      12.7 +/-    2.81  0.170 / 0.230
G29     307.2          29.3               11.3 +/-    0.86      20.0 +/-    0.86  0.140 / 0.310