PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-07:12:30
G01     224.0          15.0                5.7 +/-    1.11      14.1 +/-    1.11  0.050 / 0.090
G03     284.2          67.0                4.8 +/-    0.98       5.1 +/-    0.98  0.060 / 0.090
G09     296.7          12.1                5.1 +/-    1.31      13.5 +/-    1.31  0.040 / 0.050
G14     90.0           20.9                4.5 +/-    0.82       9.6 +/-    0.82  0.040 / 0.050
G16     146.7          47.3                7.8 +/-    1.05      10.2 +/-    1.05  0.160 / 0.210
G22     209.3          68.5                6.8 +/-    0.82       7.2 +/-    0.82  0.150 / 0.280
G23     308.5          37.9                4.2 +/-    1.18       6.3 +/-    1.18  0.040 / 0.070
G26     95.8           55.3                7.7 +/-    0.79       9.1 +/-    0.79  0.040 / 0.070
G31     45.8           30.8                3.6 +/-    0.40       6.2 +/-    0.40  0.090 / 0.270