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               12.1 +/-    1.85      19.0 +/-    1.85  0.060 / 0.080
G06     144.3          73.9               11.4 +/-    0.70      11.8 +/-    0.70  0.070 / 0.090
G12     311.0          22.5                5.1 +/-    2.23      10.5 +/-    2.23  0.070 / 0.150
G17     40.7           45.2                7.9 +/-    0.30      10.7 +/-    0.30  0.080 / 0.150
G19     0.4            64.8                8.7 +/-    0.87       9.5 +/-    0.87  0.040 / 0.030
G24     291.9          40.9                7.7 +/-    0.82      11.0 +/-    0.82  0.030 / 0.030
G28     105.7          28.9                9.5 +/-    2.10      17.0 +/-    2.10  0.050 / 0.050