PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/20-00:27:50
G03     199.2          39.8                6.5 +/-    1.04       9.5 +/-    1.04  0.090 / 0.140
G07     272.3          26.6                5.2 +/-    0.66       9.8 +/-    0.66  0.080 / 0.120
G08     153.6          12.6                6.6 +/-    3.64      17.4 +/-    3.64  0.030 / 0.040
G09     317.8          43.4                4.3 +/-    1.07       6.0 +/-    1.07  0.030 / 0.040
G16     59.3           59.9                6.4 +/-    0.76       7.2 +/-    0.76  0.170 / 0.250
G22     183.3          24.1                7.1 +/-    0.94      14.1 +/-    0.94  0.130 / 0.230
G23     353.5          75.6                5.3 +/-    0.70       5.5 +/-    0.70  0.050 / 0.050
G26     44.5           29.8                3.8 +/-    1.41       6.6 +/-    1.41  0.040 / 0.040
G27     118.3          23.3                7.7 +/-    0.93      15.6 +/-    0.93  0.080 / 0.110