PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-19:12:30
G02     213.4          56.0               12.2 +/-    0.62      14.4 +/-    0.62  0.110 / 0.230
G06     71.6           77.7               10.6 +/-    0.32      10.9 +/-    0.32  0.100 / 0.210
G12     316.3          30.7               10.8 +/-    1.53      18.7 +/-    1.53  0.040 / 0.050
G17     52.9           35.9               10.0 +/-    1.32      15.6 +/-    1.32  0.040 / 0.060
G19     35.8           50.7                9.8 +/-    1.37      12.3 +/-    1.37  0.070 / 0.070
G24     270.3          42.0               13.2 +/-    2.60      18.6 +/-    2.60  0.060 / 0.080
G28     118.3          21.3               11.8 +/-    1.51      25.2 +/-    1.51  0.080 / 0.110