PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-20:43:00
G08     321.2          10.4              -12.8 +/-   36.28     -35.5 +/-   36.28  0.060 / 0.080
G10     300.8          52.5               13.9 +/-    0.47      17.0 +/-    0.47  0.050 / 0.090
G14     210.9          15.6               19.0 +/-    3.12      46.7 +/-    3.12  0.030 / 0.040
G15     45.7           25.2               13.4 +/-    0.86      26.1 +/-    0.86  0.030 / 0.050
G18     6.5            65.3               12.9 +/-    0.90      14.1 +/-    0.90  0.070 / 0.150
G20     73.3           16.7               14.9 +/-    1.77      35.5 +/-    1.77  0.060 / 0.130
G21     108.3          69.5               16.4 +/-    0.93      17.4 +/-    0.93  0.280 / 0.340
G24     95.9           27.6               17.0 +/-    1.14      31.3 +/-    1.14  0.140 / 0.270
G27     295.5          36.2               15.7 +/-    1.79      24.4 +/-    1.79  0.090 / 0.390
G32     212.6          32.2               16.6 +/-    1.08      27.8 +/-    1.08  0.130 / 0.440