PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-17:42:30
G01     240.7          29.1               10.3 +/-    1.51      18.4 +/-    1.51  0.040 / 0.040
G03     310.9          57.0                7.9 +/-    1.93       9.2 +/-    1.93  0.040 / 0.030
G14     69.6           36.1                7.4 +/-    1.32      11.5 +/-    1.32  0.060 / 0.110
G16     158.5          27.7               10.8 +/-    2.42      19.9 +/-    2.42  0.040 / 0.090
G22     277.7          75.2                8.4 +/-    0.36       8.7 +/-    0.36  0.080 / 0.160
G23     295.1          27.0                8.0 +/-    1.77      15.0 +/-    1.77  0.090 / 0.150
G31     40.7           47.5                5.5 +/-    0.52       7.1 +/-    0.52  0.050 / 0.050
G32     86.2           16.0                8.2 +/-    1.42      19.9 +/-    1.42  0.070 / 0.050