PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-00:27:40
G03     201.3          43.6                7.8 +/-    0.66      10.7 +/-    0.66  0.070 / 0.100
G07     269.1          24.4                5.6 +/-    2.11      11.1 +/-    2.11  0.100 / 0.140
G09     316.5          40.1                3.5 +/-    1.10       5.0 +/-    1.10  0.030 / 0.030
G16     66.1           62.6                5.6 +/-    0.54       6.3 +/-    0.54  0.030 / 0.030
G22     184.4          27.7                7.1 +/-    1.77      13.0 +/-    1.77  0.080 / 0.150
G23     346.2          72.3                4.8 +/-    0.49       5.0 +/-    0.49  0.080 / 0.160
G26     45.7           33.1                4.4 +/-    1.33       7.2 +/-    1.33  0.060 / 0.060
G27     121.5          20.9                9.2 +/-    1.47      19.8 +/-    1.47  0.050 / 0.050