PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-15:28:00
G02     204.8          33.7               11.6 +/-    1.86      18.9 +/-    1.86  0.080 / 0.100
G06     149.2          72.2               11.5 +/-    0.63      12.1 +/-    0.63  0.130 / 0.100
G12     310.0          21.0                8.5 +/-    1.96      18.2 +/-    1.96  0.230 / 0.250
G17     39.1           46.6                9.3 +/-    1.47      12.2 +/-    1.47  0.090 / 0.140
G19     356.3          65.7                9.7 +/-    0.37      10.6 +/-    0.37  0.030 / 0.020
G24     294.2          40.2                6.9 +/-   11.33      10.1 +/-   11.33  0.050 / 0.020
G28     104.0          30.2                9.4 +/-    1.67      16.4 +/-    1.67  0.040 / 0.040