PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-08:28:00
G02     201.7          32.9                5.5 +/-    1.38       9.1 +/-    1.38  0.060 / 0.110
G06     173.0          61.9                5.0 +/-    0.42       5.6 +/-    0.42  0.070 / 0.110
G12     305.6          11.6               -0.3 +/-   13.82      -0.8 +/-   13.82  0.140 / 0.210
G17     34.3           50.7                1.1 +/-    0.92       1.4 +/-    0.92  0.230 / 0.280
G19     358.0          66.4                0.3 +/-    0.51       0.3 +/-    0.51  0.030 / 0.030
G24     302.4          35.5                1.6 +/-    1.69       2.5 +/-    1.69  0.030 / 0.040
G28     100.0          32.5                3.6 +/-    0.83       6.0 +/-    0.83  0.070 / 0.080