PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-15:27:50
G01     39.7           13.6                6.0 +/-    1.73      15.4 +/-    1.73  0.070 / 0.220
G06     174.3          42.7               10.9 +/-    1.00      15.2 +/-    1.00  0.070 / 0.250
G13     236.9          20.0               11.4 +/-    1.21      25.2 +/-    1.21  0.050 / 0.140
G15     270.4          11.2                9.7 +/-    1.95      26.5 +/-    1.95  0.060 / 0.140
G17     13.4           66.0                8.1 +/-    0.60       8.8 +/-    0.60  0.150 / 0.340
G19     294.2          71.8                9.5 +/-    0.67       9.9 +/-    0.67  0.110 / 0.340
G24     316.2          20.4                5.7 +/-    1.11      12.4 +/-    1.11  0.030 / 0.040
G28     76.3           44.9                8.4 +/-    0.35      11.3 +/-    0.35  0.030 / 0.040
G30     155.8          26.1               11.1 +/-    0.86      21.2 +/-    0.86  0.090 / 0.130