PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-15:27:50
G02     205.4          35.6               10.7 +/-    1.37      16.9 +/-    1.37  0.060 / 0.090
G06     144.3          73.9                9.4 +/-    0.58       9.8 +/-    0.58  0.090 / 0.090
G12     311.0          22.5                6.2 +/-    1.30      12.9 +/-    1.30  0.080 / 0.120
G17     40.7           45.2                8.1 +/-    0.91      10.8 +/-    0.91  0.060 / 0.120
G19     0.4            64.8                8.2 +/-    0.53       8.9 +/-    0.53  0.030 / 0.020
G24     291.9          40.9                8.0 +/-    9.32      11.5 +/-    9.32  0.040 / 0.020
G28     105.7          28.9               10.8 +/-    0.81      19.3 +/-    0.81  0.050 / 0.040