PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-21:28:10
G03     241.1          68.8                8.2 +/-    0.46       8.7 +/-    0.46  0.040 / 0.050
G09     303.2          18.8                6.6 +/-    1.32      14.8 +/-    1.32  0.030 / 0.060
G14     99.0           14.3                9.0 +/-    1.02      22.8 +/-    1.02  0.090 / 0.280
G16     131.5          57.5               10.5 +/-    1.39      12.2 +/-    1.39  0.110 / 0.330
G22     196.4          56.5                8.4 +/-    0.96       9.9 +/-    0.96  0.040 / 0.040
G23     316.9          46.4                7.7 +/-    1.01      10.2 +/-    1.01  0.040 / 0.050
G26     75.0           54.3                7.6 +/-    0.99       9.1 +/-    0.99  0.040 / 0.050
G31     50.4           24.6                7.4 +/-    1.47      14.7 +/-    1.47  0.040 / 0.050