PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-17:42:30
G02     202.6          23.4               13.2 +/-    1.70      26.7 +/-    1.70  0.120 / 0.210
G06     166.5          61.5               -8.6 +/-   14.59      -9.7 +/-   14.59  0.220 / 0.230
G12     304.2          11.1               -2.3 +/-   19.73      -6.2 +/-   19.73  0.290 / 0.250
G17     32.1           52.6               25.2 +/-   15.21      30.8 +/-   15.21  0.150 / 0.250
G19     350.3          68.5              -57.6 +/-   53.08     -61.4 +/-   53.08  0.330 / 0.470
G28     95.5           35.7                2.6 +/-    8.33       4.1 +/-    8.33  0.290 / 0.400
G30     158.3          10.6                2.0 +/-   23.16       5.5 +/-   23.16  0.040 / 0.030