PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-14:12:30
G02     205.6          40.6                7.9 +/-    1.20      11.4 +/-    1.20  0.170 / 0.250
G06     149.7          75.1                8.5 +/-    0.99       8.7 +/-    0.99  0.120 / 0.250
G12     311.2          20.2                7.8 +/-    1.76      17.0 +/-    1.76  0.050 / 0.090
G17     44.3           42.2                5.7 +/-    0.47       8.0 +/-    0.47  0.050 / 0.090
G19     18.3           59.8                6.6 +/-    0.80       7.5 +/-    0.80  0.030 / 0.060
G24     292.1          39.9                7.4 +/-    0.97      10.8 +/-    0.97  0.030 / 0.060
G28     109.3          26.1                8.5 +/-    1.06      16.2 +/-    1.06  0.030 / 0.030