PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-14:28:10
G02     217.6          61.7               10.3 +/-    1.46      11.5 +/-    1.46  0.060 / 0.070
G06     54.7           74.2                7.8 +/-    0.92       8.1 +/-    0.92  0.070 / 0.060
G12     319.2          37.5                6.8 +/-    0.92      10.3 +/-    0.92  0.080 / 0.080
G17     61.0           28.8                8.0 +/-    1.88      14.4 +/-    1.88  0.040 / 0.060
G19     44.3           46.2                5.6 +/-    1.05       7.4 +/-    1.05  0.050 / 0.100
G24     264.7          40.9                9.1 +/-    0.98      13.0 +/-    0.98  0.080 / 0.070
G28     124.6          11.3               13.3 +/-    1.77      36.2 +/-    1.77  0.040 / 0.030