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               12.3 +/-    1.48      22.2 +/-    1.48  0.130 / 0.090
G06     158.1          67.4               11.1 +/-    0.88      11.9 +/-    0.88  0.130 / 0.080
G12     307.3          17.2                5.6 +/-    1.57      13.2 +/-    1.57  0.080 / 0.190
G17     34.7           50.2                8.1 +/-    0.63      10.2 +/-    0.63  0.070 / 0.150
G19     343.8          68.0                8.6 +/-    0.73       9.2 +/-    0.73  0.040 / 0.040
G24     299.7          37.8                8.3 +/-    1.19      12.4 +/-    1.19  0.050 / 0.040
G28     99.2           33.4                9.3 +/-    0.52      15.2 +/-    0.52  0.030 / 0.040