PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-21:13:10
G01     241.3          29.6               11.4 +/-    1.36      20.1 +/-    1.36  0.030 / 0.030
G03     312.2          53.4                8.4 +/-    0.99      10.2 +/-    0.99  0.040 / 0.030
G14     69.8           35.3                9.6 +/-    0.97      15.1 +/-    0.97  0.110 / 0.190
G16     160.9          25.6               12.7 +/-    0.81      24.5 +/-    0.81  0.100 / 0.180
G22     285.5          73.2               10.9 +/-    0.86      11.4 +/-    0.86  0.040 / 0.040
G23     293.6          24.9                8.8 +/-    0.81      17.3 +/-    0.81  0.030 / 0.040
G26     128.0          45.1               12.4 +/-    0.58      16.7 +/-    0.58  0.110 / 0.170
G31     40.1           50.2                8.7 +/-    0.75      11.0 +/-    0.75  0.100 / 0.140
G32     85.1           17.5                8.9 +/-    2.13      20.7 +/-    2.13  0.050 / 0.090