PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-22:12:20
G02     201.2          28.3               17.3 +/-    1.07      31.4 +/-    1.07  0.070 / 0.110
G06     170.6          59.5               16.8 +/-    0.93      19.2 +/-    0.93  0.070 / 0.120
G17     30.1           53.7               13.6 +/-    0.44      16.4 +/-    0.44  0.050 / 0.100
G19     345.2          68.8               13.4 +/-    0.67      14.2 +/-    0.67  0.040 / 0.070
G24     303.5          35.1               14.4 +/-    0.97      22.8 +/-    0.97  0.060 / 0.040
G28     92.8           39.2               14.2 +/-    0.47      21.0 +/-    0.47  0.050 / 0.040