PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/20-17:12:30
G01     319.1          19.2                7.0 +/-    1.85      15.7 +/-    1.85  0.040 / 0.050
G08     257.9          14.4                6.6 +/-    2.58      16.7 +/-    2.58  0.040 / 0.050
G10     78.5           52.1                7.3 +/-    0.64       9.0 +/-    0.64  0.150 / 0.440
G11     308.1          18.7                5.3 +/-    1.37      12.0 +/-    1.37  0.130 / 0.390
G14     281.3          67.8                7.3 +/-    0.76       7.9 +/-    0.76  0.040 / 0.030
G20     105.4          26.9                9.4 +/-    1.45      17.6 +/-    1.45  0.040 / 0.040
G31     177.0          39.0                8.4 +/-    0.74      12.3 +/-    0.74  0.040 / 0.060
G32     8.5            67.8                6.9 +/-    0.51       7.3 +/-    0.51  0.040 / 0.070