PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-14:57:40
G02     233.2          69.0                6.5 +/-    0.51       6.9 +/-    0.51  0.090 / 0.090
G05     174.8          12.2                5.6 +/-    3.85      14.9 +/-    3.85  0.110 / 0.090
G06     41.5           59.9                6.3 +/-    0.43       7.2 +/-    0.43  0.030 / 0.040
G12     322.4          52.7                6.5 +/-    0.77       8.0 +/-    0.77  0.030 / 0.040
G17     69.5           22.6                6.2 +/-    1.12      12.7 +/-    1.12  0.210 / 0.360
G19     50.1           44.2                7.4 +/-    1.09      10.0 +/-    1.09  0.160 / 0.390
G24     245.0          36.0                8.5 +/-    1.97      13.3 +/-    1.97  0.230 / 0.350
G25     316.1          12.0               -3.2 +/-   29.42      -8.6 +/-   29.42  0.210 / 0.350