PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/26-22:42:50
G03     246.8          69.3                8.6 +/-    1.32       9.2 +/-    1.32  0.050 / 0.030
G09     301.4          15.3                7.3 +/-    2.23      17.9 +/-    2.23  0.050 / 0.040
G14     97.4           16.4                9.6 +/-    2.23      23.1 +/-    2.23  0.070 / 0.180
G16     137.9          55.8               10.4 +/-    0.45      12.3 +/-    0.45  0.050 / 0.120
G22     198.1          59.2               10.2 +/-    0.37      11.7 +/-    0.37  0.030 / 0.050
G23     316.5          46.2                8.1 +/-    0.92      10.8 +/-    0.92  0.040 / 0.040
G26     76.1           54.0                7.4 +/-    0.69       8.9 +/-    0.69  0.100 / 0.290
G31     50.2           23.3                5.9 +/-    2.06      11.9 +/-    2.06  0.110 / 0.310