PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-20:57:30
G10     307.4          55.4                9.5 +/-    0.78      11.2 +/-    0.78  0.070 / 0.090
G14     211.6          14.0               12.1 +/-    1.86      30.7 +/-    1.86  0.060 / 0.080
G15     45.6           23.5                7.6 +/-    0.85      15.5 +/-    0.85  0.040 / 0.050
G20     7.8            64.4                9.7 +/-    0.39      10.6 +/-    0.39  0.040 / 0.040
G21     109.4          71.3               11.1 +/-    1.12      11.7 +/-    1.12  0.130 / 0.660
G24     93.6           28.5                9.4 +/-    0.97      16.9 +/-    0.97  0.150 / 0.680
G27     295.1          36.3               10.8 +/-    1.54      16.8 +/-    1.54  0.060 / 0.120
G32     212.3          37.5               11.7 +/-    1.25      17.7 +/-    1.25  0.060 / 0.120