PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/06-17:57:40
G02     212.7          51.4               17.8 +/-    1.79      22.1 +/-    1.79  0.040 / 0.080
G06     75.6           77.9               15.3 +/-    0.95      15.6 +/-    0.95  0.040 / 0.090
G12     317.4          32.5               13.5 +/-    1.75      22.4 +/-    1.75  0.050 / 0.100
G17     55.3           33.2               11.1 +/-    0.46      18.3 +/-    0.46  0.050 / 0.100
G19     36.4           50.8               11.9 +/-    0.35      14.9 +/-    0.35  0.050 / 0.080
G24     274.8          42.0               13.7 +/-    1.23      19.3 +/-    1.23  0.060 / 0.090
G28     119.6          17.0               13.5 +/-    1.09      32.0 +/-    1.09  0.030 / 0.030