PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/21-14:43:00
G01     49.8           25.0                8.9 +/-    2.15      17.4 +/-    2.15  0.050 / 0.060
G06     177.9          25.4               12.5 +/-    1.74      24.3 +/-    1.74  0.050 / 0.060
G11     44.0           12.4                5.2 +/-    3.32      13.8 +/-    3.32  0.080 / 0.300
G13     252.5          30.1               10.4 +/-    2.21      18.2 +/-    2.21  0.100 / 0.340
G15     285.8          15.4                7.1 +/-    0.75      17.4 +/-    0.75  0.120 / 0.120
G17     330.6          78.4               10.1 +/-    0.35      10.3 +/-    0.35  0.090 / 0.080
G19     249.1          62.4               11.4 +/-    0.92      12.7 +/-    0.92  0.020 / 0.020
G28     53.4           52.5                8.8 +/-    0.52      10.8 +/-    0.52  0.030 / 0.020
G30     149.9          43.0               10.4 +/-    1.10      14.5 +/-    1.10  0.110 / 0.260