PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/08-21:57:40
G10     249.4          24.8                9.5 +/-    1.93      18.5 +/-    1.93  0.050 / 0.050
G13     56.1           32.2                8.7 +/-    0.87      14.5 +/-    0.87  0.040 / 0.050
G15     90.4           57.8               10.1 +/-    0.49      11.7 +/-    0.49  0.120 / 0.440
G16     300.0          14.1                7.3 +/-    1.58      18.6 +/-    1.58  0.130 / 0.420
G18     267.0          55.0                8.8 +/-    1.12      10.5 +/-    1.12  0.090 / 0.300
G20     42.2           49.2                8.8 +/-    0.67      11.2 +/-    0.67  0.100 / 0.340
G21     333.1          60.1               11.3 +/-    0.98      12.8 +/-    0.98  0.060 / 0.120
G26     272.3          15.8                9.6 +/-    2.26      23.4 +/-    2.26  0.050 / 0.130
G29     162.8          47.6               12.0 +/-    0.88      15.6 +/-    0.88  0.050 / 0.070