PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-19:57:50
G08     263.5          17.6               10.6 +/-    0.86      24.7 +/-    0.86  0.040 / 0.040
G10     65.1           57.1                9.0 +/-    1.11      10.5 +/-    1.11  0.040 / 0.040
G11     309.5          19.2                9.2 +/-    0.96      20.7 +/-    0.96  0.240 / 0.360
G14     271.4          67.6                8.8 +/-    0.72       9.5 +/-    0.72  0.220 / 0.330
G20     97.2           35.3                9.2 +/-    0.81      14.6 +/-    0.81  0.120 / 0.220
G21     154.5          11.8                9.4 +/-    1.52      25.3 +/-    1.52  0.170 / 0.170
G27     232.4          15.3               11.6 +/-    2.39      28.7 +/-    2.39  0.320 / 0.260
G31     179.6          30.3                9.7 +/-    2.17      16.8 +/-    2.17  0.200 / 0.220
G32     344.0          73.4                9.1 +/-    0.40       9.5 +/-    0.40  0.030 / 0.030