PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-17:57:40
G02     212.8          53.2               12.5 +/-    0.84      15.2 +/-    0.84  0.050 / 0.050
G06     70.3           76.4               11.1 +/-    0.35      11.4 +/-    0.35  0.060 / 0.060
G12     317.9          35.0                9.0 +/-    1.45      14.3 +/-    1.45  0.090 / 0.100
G17     53.4           35.3               10.3 +/-    1.35      16.2 +/-    1.35  0.090 / 0.080
G19     29.2           54.7               10.0 +/-    1.58      11.9 +/-    1.58  0.030 / 0.020
G24     270.5          42.7               11.6 +/-    2.16      16.2 +/-    2.16  0.030 / 0.020
G28     119.1          17.5               11.7 +/-    1.36      27.4 +/-    1.36  0.050 / 0.050