PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-07:12:40
G01     224.0          15.0                8.3 +/-    3.87      20.7 +/-    3.87  0.140 / 0.290
G03     284.2          67.0                5.3 +/-    0.42       5.7 +/-    0.42  0.210 / 0.420
G09     296.7          12.1                2.9 +/-    5.98       7.7 +/-    5.98  0.040 / 0.030
G14     90.0           20.9                4.5 +/-    1.30       9.8 +/-    1.30  0.030 / 0.030
G16     146.7          47.3                7.7 +/-    0.71      10.0 +/-    0.71  0.170 / 0.340
G22     209.3          68.5                5.1 +/-    0.32       5.5 +/-    0.32  0.210 / 0.430
G23     308.5          37.9                3.5 +/-    2.04       5.3 +/-    2.04  0.060 / 0.110
G26     95.8           55.3                7.2 +/-    0.54       8.6 +/-    0.54  0.070 / 0.070
G31     45.8           30.8                3.5 +/-    1.90       6.0 +/-    1.90  0.120 / 0.220