PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/31-20:58:00
G08     273.4          21.3                9.8 +/-    1.87      21.0 +/-    1.87  0.040 / 0.050
G10     45.9           60.8                8.4 +/-    0.56       9.5 +/-    0.56  0.040 / 0.050
G14     250.8          60.9                9.1 +/-    0.68      10.2 +/-    0.68  0.080 / 0.190
G18     315.3          26.6                7.2 +/-    0.79      13.6 +/-    0.79  0.090 / 0.180
G20     86.9           41.9                7.7 +/-    1.11      10.8 +/-    1.11  0.150 / 0.270
G21     152.8          22.0               10.0 +/-    1.00      20.9 +/-    1.00  0.160 / 0.290
G24     41.7           12.8                7.7 +/-    2.89      20.1 +/-    2.89  0.330 / 0.190
G27     239.9          21.7                8.9 +/-    1.48      18.7 +/-    1.48  0.210 / 0.270
G31     180.8          21.2               10.3 +/-    2.65      22.1 +/-    2.65  0.120 / 0.130
G32     306.1          76.4                8.4 +/-    0.66       8.6 +/-    0.66  0.070 / 0.090