PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-12:58:00
G01     249.7          35.5                7.9 +/-    1.86      12.5 +/-    1.86  0.080 / 0.100
G03     316.0          49.4                4.8 +/-    0.78       6.2 +/-    0.78  0.060 / 0.070
G11     236.0          11.2                6.3 +/-    3.80      17.2 +/-    3.80  0.050 / 0.090
G14     61.0           40.0                5.3 +/-    1.55       7.8 +/-    1.55  0.050 / 0.090
G16     165.6          16.1               -2.7 +/-   16.32      -6.5 +/-   16.32  0.090 / 0.090
G18     218.0          26.2                5.5 +/-    4.31      10.5 +/-    4.31  0.080 / 0.120
G23     286.9          19.7                5.3 +/-    1.21      11.7 +/-    1.21  0.090 / 0.210
G26     139.6          37.3                7.2 +/-    0.43      10.9 +/-    0.43  0.060 / 0.230
G31     41.3           59.1                5.4 +/-    0.38       6.2 +/-    0.38  0.160 / 0.440
G32     74.7           27.4                3.7 +/-    1.96       6.8 +/-    1.96  0.170 / 0.450