PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/11-15:27:50
G03     240.0          69.9                9.7 +/-    0.65      10.2 +/-    0.65  0.100 / 0.250
G09     301.0          14.8                6.2 +/-    1.76      15.4 +/-    1.76  0.140 / 0.250
G14     95.7           19.6                7.3 +/-    1.86      16.3 +/-    1.86  0.070 / 0.070
G16     131.0          56.6               10.4 +/-    0.49      12.2 +/-    0.49  0.120 / 0.120
G22     191.3          56.3                9.3 +/-    0.60      10.9 +/-    0.60  0.040 / 0.050
G23     319.5          49.6                7.9 +/-    0.42      10.0 +/-    0.42  0.050 / 0.050
G26     72.9           52.1                8.1 +/-    0.84      10.0 +/-    0.84  0.030 / 0.040
G31     50.9           20.8                6.9 +/-    3.89      14.9 +/-    3.89  0.030 / 0.050