PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-20:58:10
G08     316.7          14.7               12.3 +/-    1.81      30.8 +/-    1.81  0.050 / 0.090
G10     312.1          55.8               12.5 +/-    0.73      14.8 +/-    0.73  0.050 / 0.100
G14     213.4          22.3               19.1 +/-    1.83      39.8 +/-    1.83  0.030 / 0.040
G15     45.5           19.0               12.3 +/-    0.63      27.7 +/-    0.63  0.040 / 0.060
G18     21.4           63.1               12.1 +/-    0.78      13.4 +/-    0.78  0.060 / 0.120
G20     78.5           12.1               15.3 +/-    1.93      40.8 +/-    1.93  0.060 / 0.120
G21     121.7          63.7               16.1 +/-    0.53      17.7 +/-    0.53  0.100 / 0.240
G24     87.7           29.7               15.2 +/-    0.73      26.9 +/-    0.73  0.100 / 0.270
G27     286.6          37.8               13.4 +/-    1.43      20.3 +/-    1.43  0.130 / 0.380
G32     216.3          39.3               17.1 +/-    0.96      25.2 +/-    0.96  0.130 / 0.440