PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-21:42:50
G08     307.6          19.3                7.8 +/-    0.71      17.5 +/-    0.71  0.050 / 0.050
G10     345.5          61.7                8.0 +/-    0.94       9.0 +/-    0.94  0.040 / 0.050
G14     220.4          32.8               10.9 +/-    1.49      18.1 +/-    1.49  0.120 / 0.180
G20     48.4           57.4                9.9 +/-    1.15      11.5 +/-    1.15  0.130 / 0.160
G21     138.9          53.2               10.7 +/-    0.78      12.9 +/-    0.78  0.090 / 0.190
G24     69.8           30.1                9.2 +/-    0.74      16.1 +/-    0.74  0.090 / 0.190
G27     268.9          36.8               10.0 +/-    1.62      15.3 +/-    1.62  0.060 / 0.070
G32     227.3          57.6               10.7 +/-    2.43      12.4 +/-    2.43  0.070 / 0.070