PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-23:12:30
G02     204.8          41.1               14.6 +/-    1.39      20.9 +/-    1.39  0.090 / 0.110
G06     158.7          72.7               13.5 +/-    0.38      14.1 +/-    0.38  0.070 / 0.080
G12     309.2          17.2                8.9 +/-    2.60      21.0 +/-    2.60  0.150 / 0.220
G17     41.5           44.4                8.9 +/-    1.11      12.1 +/-    1.11  0.170 / 0.190
G19     12.1           61.8                9.6 +/-    0.53      10.8 +/-    0.53  0.050 / 0.040
G24     289.9          41.1                7.7 +/-    6.56      11.1 +/-    6.56  0.050 / 0.040
G28     105.5          31.2               10.9 +/-    1.35      18.6 +/-    1.35  0.060 / 0.110