PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-13:57:50
G03     204.6          55.4                7.3 +/-    0.94       8.7 +/-    0.94  0.040 / 0.050
G07     259.4          21.3                6.8 +/-    3.19      14.6 +/-    3.19  0.180 / 0.260
G09     310.0          27.2                5.7 +/-    2.63      10.6 +/-    2.63  0.100 / 0.250
G16     102.8          65.1                8.0 +/-    0.57       8.7 +/-    0.57  0.110 / 0.270
G22     185.3          38.3                6.8 +/-    0.62      10.2 +/-    0.62  0.060 / 0.080
G23     330.9          60.6                6.0 +/-    0.68       6.8 +/-    0.68  0.070 / 0.080
G26     55.0           45.0                5.4 +/-    0.73       7.2 +/-    0.73  0.140 / 0.170
G27     135.4          10.1               -9.5 +/-   27.35     -26.5 +/-   27.35  0.180 / 0.260
G31     59.5           10.2                6.1 +/-    3.37      17.1 +/-    3.37  0.040 / 0.040