PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-00:12:30
G02     204.1          40.5               14.1 +/-    0.73      20.4 +/-    0.73  0.170 / 0.060
G06     151.6          73.5               13.4 +/-    0.59      13.9 +/-    0.59  0.150 / 0.090
G12     309.8          18.3               11.3 +/-    2.18      25.9 +/-    2.18  0.070 / 0.070
G17     35.7           49.8               11.0 +/-    1.14      13.8 +/-    1.14  0.060 / 0.030
G19     8.4            63.0               11.1 +/-    0.48      12.3 +/-    0.48  0.030 / 0.010
G24     293.2          39.8                9.1 +/-    7.29      13.2 +/-    7.29  0.030 / 0.010
G28     106.8          27.9               14.2 +/-    1.79      26.0 +/-    1.79  0.080 / 0.120