PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/27-17:58:10
G01     41.5           16.9                8.7 +/-    2.98      20.6 +/-    2.98  0.260 / 0.250
G06     173.7          39.8               11.4 +/-    1.21      16.6 +/-    1.21  0.190 / 0.300
G13     238.1          22.4               10.9 +/-    1.51      22.6 +/-    1.51  0.060 / 0.100
G15     273.3          12.2                9.3 +/-    2.37      24.8 +/-    2.37  0.060 / 0.090
G17     357.2          71.5               11.2 +/-    0.68      11.8 +/-    0.68  0.150 / 0.160
G19     271.1          66.7               10.7 +/-    0.72      11.5 +/-    0.72  0.210 / 0.290
G24     316.4          19.6                8.1 +/-    2.35      18.1 +/-    2.35  0.030 / 0.030
G28     70.8           47.1               10.3 +/-    1.55      13.5 +/-    1.55  0.020 / 0.030
G30     154.6          28.5               11.4 +/-    0.94      20.7 +/-    0.94  0.040 / 0.040