PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/30-13:42:40
G07     311.9          50.7                6.7 +/-    0.77       8.4 +/-    0.77  0.040 / 0.060
G08     129.2          40.0               10.5 +/-    0.72      15.3 +/-    0.72  0.040 / 0.060
G09     306.8          76.8                6.9 +/-    0.94       7.0 +/-    0.94  0.030 / 0.030
G16     42.1           26.1                5.9 +/-    1.35      11.2 +/-    1.35  0.030 / 0.030
G23     143.2          62.4                9.0 +/-    0.56      10.0 +/-    0.56  0.060 / 0.080
G27     81.7           37.5                6.4 +/-    0.98       9.7 +/-    0.98  0.050 / 0.080
G30     286.9          24.6                7.5 +/-    1.07      14.8 +/-    1.07  0.090 / 0.190