PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-22:12:50
G02     201.2          28.3               16.5 +/-    1.82      30.0 +/-    1.82  0.070 / 0.110
G06     170.6          59.5               16.1 +/-    0.45      18.3 +/-    0.45  0.070 / 0.100
G17     30.1           53.7               13.3 +/-    0.97      16.1 +/-    0.97  0.060 / 0.090
G19     345.2          68.8               12.5 +/-    0.55      13.3 +/-    0.55  0.050 / 0.080
G24     303.5          35.1               13.6 +/-    1.50      21.6 +/-    1.50  0.040 / 0.030
G28     92.8           39.2               15.0 +/-    0.89      22.0 +/-    0.89  0.050 / 0.040