PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-13:27:40
G01     46.1           22.0                7.4 +/-    2.90      15.5 +/-    2.90  0.070 / 0.180
G06     177.4          29.8                8.7 +/-    1.83      15.2 +/-    1.83  0.110 / 0.180
G13     247.6          27.4                6.4 +/-    2.66      11.9 +/-    2.66  0.180 / 0.260
G15     280.3          14.7                4.9 +/-    1.40      12.3 +/-    1.40  0.230 / 0.300
G17     348.9          75.3                8.0 +/-    0.43       8.2 +/-    0.43  0.060 / 0.070
G19     259.1          66.0                7.9 +/-    0.78       8.6 +/-    0.78  0.060 / 0.060
G24     319.0          10.9              -11.0 +/-   27.70     -30.2 +/-   27.70  0.020 / 0.020
G28     60.7           50.4                7.4 +/-    0.75       9.3 +/-    0.75  0.030 / 0.020
G30     152.0          37.5                8.2 +/-    0.58      12.4 +/-    0.58  0.070 / 0.160