PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/03-15:27:50
G07     310.0          50.1                8.3 +/-    1.29      10.5 +/-    1.29  0.040 / 0.030
G08     130.4          38.3                9.4 +/-    0.52      14.0 +/-    0.52  0.030 / 0.030
G09     311.7          74.4                6.8 +/-    0.66       7.0 +/-    0.66  0.040 / 0.090
G16     42.0           29.5                4.3 +/-    1.16       7.6 +/-    1.16  0.060 / 0.070
G23     141.0          66.4                9.4 +/-    0.82      10.2 +/-    0.82  0.030 / 0.050
G27     85.4           37.4                7.3 +/-    0.70      11.0 +/-    0.70  0.050 / 0.060
G30     284.4          22.1                6.2 +/-    1.81      12.9 +/-    1.81  0.030 / 0.040