PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-19:28:10
G07     125.7          39.8               14.3 +/-    0.74      20.9 +/-    0.74  0.030 / 0.030
G11     68.0           39.9               12.2 +/-    1.40      17.8 +/-    1.40  0.030 / 0.020
G13     294.9          36.6               14.5 +/-    4.99      22.4 +/-    4.99  0.060 / 0.190
G17     212.8          53.2               18.0 +/-    0.68      21.9 +/-    0.68  0.110 / 0.160
G18     62.5           23.1               10.4 +/-    1.07      21.3 +/-    1.07  0.090 / 0.130
G19     213.5          26.6               17.0 +/-    1.88      32.0 +/-    1.88  0.080 / 0.110
G28     337.5          61.5               13.3 +/-    0.60      14.9 +/-    0.60  0.110 / 0.120
G30     105.1          75.0               14.8 +/-    1.18      15.3 +/-    1.18  0.090 / 0.180