PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/20-20:57:40
G05     53.5           10.2               13.0 +/-    2.86      36.0 +/-    2.86  0.040 / 0.050
G10     245.5          21.4               17.4 +/-    1.80      37.0 +/-    1.80  0.040 / 0.070
G13     61.2           34.4               15.3 +/-    0.91      24.5 +/-    0.91  0.120 / 0.270
G15     99.8           57.6               17.2 +/-    0.57      20.0 +/-    0.57  0.110 / 0.280
G16     305.2          13.6               11.5 +/-    1.93      29.5 +/-    1.93  0.130 / 0.360
G18     260.5          52.1               17.0 +/-    1.07      20.9 +/-    1.07  0.110 / 0.450
G20     38.5           53.8               14.8 +/-    0.75      17.9 +/-    0.75  0.040 / 0.060
G21     327.9          57.0               15.6 +/-    0.73      18.2 +/-    0.73  0.040 / 0.050
G26     277.7          17.2               12.8 +/-    1.35      30.1 +/-    1.35  0.090 / 0.340
G29     160.8          52.5               16.9 +/-    0.83      20.7 +/-    0.83  0.070 / 0.260