PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/25-15:12:40
G02     231.8          71.9               11.6 +/-    0.31      12.2 +/-    0.31  0.460 / 0.450
G05     176.1          10.6               -1.3 +/-   21.63      -3.5 +/-   21.63  0.290 / 0.220
G06     42.0           63.5               17.0 +/-    0.33      18.8 +/-    0.33  0.030 / 0.040
G12     321.4          48.0                9.0 +/-    0.54      11.7 +/-    0.54  0.030 / 0.040
G17     69.7           22.2                9.7 +/-    2.02      20.3 +/-    2.02  0.090 / 0.130
G19     55.4           39.2                9.6 +/-    1.44      14.2 +/-    1.44  0.080 / 0.110
G24     251.3          36.9               11.7 +/-    1.80      17.9 +/-    1.80  0.060 / 0.090
G25     316.2          11.9               -1.4 +/-   30.44      -3.8 +/-   30.44  0.070 / 0.110