PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-13:12:40
G01     58.3           29.7                5.8 +/-    0.50      10.1 +/-    0.50  0.030 / 0.050
G06     180.2          16.1                9.0 +/-    1.89      21.7 +/-    1.89  0.040 / 0.050
G07     142.7          18.4                7.5 +/-    1.35      17.1 +/-    1.35  0.070 / 0.280
G11     47.0           20.3                5.0 +/-    1.51      10.9 +/-    1.51  0.070 / 0.260
G15     294.0          16.0                3.0 +/-    1.45       7.3 +/-    1.45  0.160 / 0.310
G17     276.2          79.3                6.1 +/-    0.78       6.2 +/-    0.78  0.190 / 0.220
G19     235.2          54.3                7.4 +/-    1.43       8.9 +/-    1.43  0.020 / 0.030
G28     39.1           55.9                4.6 +/-    0.59       5.4 +/-    0.59  0.030 / 0.030
G30     144.5          52.3                6.6 +/-    1.70       8.1 +/-    1.70  0.070 / 0.090