PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-19:27:30
G03     237.6          69.3                9.9 +/-    0.88      10.5 +/-    0.88  0.090 / 0.180
G09     301.6          15.4                8.3 +/-    1.32      20.4 +/-    1.32  0.090 / 0.170
G14     97.4           17.1               10.5 +/-    1.69      24.9 +/-    1.69  0.050 / 0.050
G16     132.8          57.1               12.7 +/-    0.85      14.9 +/-    0.85  0.040 / 0.050
G22     195.2          57.4               11.3 +/-    1.53      13.1 +/-    1.53  0.030 / 0.050
G23     318.2          48.1                8.3 +/-    0.94      10.7 +/-    0.94  0.040 / 0.050
G26     72.7           52.5                9.1 +/-    0.60      11.2 +/-    0.60  0.110 / 0.440
G31     51.1           21.1                6.4 +/-    0.95      13.8 +/-    0.95  0.110 / 0.470