PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/15-07:28:10
G01     224.1          15.1                0.8 +/-   28.06       2.0 +/-   28.06  0.310 / 0.300
G03     284.6          66.9               -1.9 +/-   12.53      -2.1 +/-   12.53  0.120 / 0.260
G09     296.6          11.8               -0.4 +/-   23.27      -1.1 +/-   23.27  0.310 / 0.250
G14     89.9           21.0                2.9 +/-    2.82       6.2 +/-    2.82  0.130 / 0.300
G16     146.7          47.2               12.8 +/-   12.28      16.7 +/-   12.28  0.070 / 0.080
G22     209.2          68.6               11.9 +/-    9.86      12.6 +/-    9.86  0.060 / 0.080
G23     308.4          37.8                2.4 +/-    1.39       3.6 +/-    1.39  0.040 / 0.030
G26     95.8           55.2              -26.5 +/-   65.09     -31.5 +/-   65.09  0.040 / 0.030
G31     45.8           30.8                7.7 +/-   18.30      13.3 +/-   18.30  0.100 / 0.220