PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-08:27:50
G03     209.4          51.7                6.4 +/-    0.63       8.0 +/-    0.63  0.040 / 0.050
G07     264.3          22.5                4.9 +/-    3.19      10.2 +/-    3.19  0.030 / 0.060
G09     315.3          37.9                5.9 +/-    1.53       8.9 +/-    1.53  0.070 / 0.110
G16     78.2           64.6                7.9 +/-    0.62       8.7 +/-    0.62  0.050 / 0.100
G22     185.5          33.9                6.2 +/-    2.10      10.1 +/-    2.10  0.060 / 0.170
G23     335.8          65.3                4.9 +/-    0.98       5.3 +/-    0.98  0.060 / 0.220
G26     49.0           39.2                4.4 +/-    0.46       6.5 +/-    0.46  0.030 / 0.050
G27     126.8          16.4                5.3 +/-    1.38      12.7 +/-    1.38  0.030 / 0.040