PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-14:12:40
G02     205.6          40.6                9.6 +/-    1.08      13.8 +/-    1.08  0.110 / 0.160
G06     149.7          75.1                9.6 +/-    0.48       9.9 +/-    0.48  0.110 / 0.190
G12     311.2          20.2                6.5 +/-    1.04      14.2 +/-    1.04  0.080 / 0.080
G17     44.3           42.2                6.4 +/-    2.54       8.9 +/-    2.54  0.070 / 0.080
G19     18.3           59.8                7.3 +/-    1.13       8.3 +/-    1.13  0.030 / 0.050
G24     292.1          39.9               10.3 +/-    6.07      15.0 +/-    6.07  0.040 / 0.050
G28     109.3          26.1                6.7 +/-    1.10      12.8 +/-    1.10  0.050 / 0.080