PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/04-07:13:10
G08     306.3          20.5                4.1 +/-    1.23       9.0 +/-    1.23  0.060 / 0.080
G10     342.3          61.4                2.9 +/-    0.47       3.3 +/-    0.47  0.070 / 0.090
G14     219.8          35.1                6.5 +/-    0.61      10.3 +/-    0.61  0.040 / 0.030
G20     45.1           58.6                5.3 +/-    0.43       6.1 +/-    0.43  0.030 / 0.030
G21     138.0          52.0                6.5 +/-    0.77       8.0 +/-    0.77  0.040 / 0.060
G24     68.7           29.1                3.8 +/-    0.80       6.7 +/-    0.80  0.040 / 0.050
G27     271.6          36.6                5.6 +/-    0.60       8.7 +/-    0.60  0.060 / 0.150
G32     226.2          51.7                6.3 +/-    0.40       7.8 +/-    0.40  0.070 / 0.110