PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-15:13:00
G02     203.4          28.7               11.7 +/-    1.67      21.1 +/-    1.67  0.160 / 0.100
G06     158.1          67.4                9.3 +/-    0.53      10.0 +/-    0.53  0.110 / 0.070
G12     307.3          17.2                5.7 +/-    1.86      13.4 +/-    1.86  0.290 / 0.170
G17     34.7           50.2                8.8 +/-    1.06      11.1 +/-    1.06  0.070 / 0.130
G19     343.8          68.0                8.2 +/-    0.40       8.8 +/-    0.40  0.030 / 0.030
G24     299.7          37.8                7.0 +/-    1.37      10.6 +/-    1.37  0.050 / 0.020
G28     99.2           33.4               10.2 +/-    1.42      16.7 +/-    1.42  0.030 / 0.030