PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/27-18:12:30
G02     205.1          39.1               12.7 +/-    1.50      18.8 +/-    1.50  0.100 / 0.090
G06     150.0          73.8               10.3 +/-    0.72      10.7 +/-    0.72  0.090 / 0.090
G12     309.1          17.5                8.0 +/-    1.35      18.8 +/-    1.35  0.050 / 0.120
G17     38.6           47.1                8.0 +/-    0.35      10.5 +/-    0.35  0.050 / 0.130
G19     13.1           61.6                8.8 +/-    0.68       9.8 +/-    0.68  0.050 / 0.100
G24     292.0          40.0                9.7 +/-    0.94      14.2 +/-    0.94  0.050 / 0.100
G28     104.4          32.7                9.6 +/-    0.61      15.9 +/-    0.61  0.080 / 0.200