PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-17:27:40
G07     315.9          50.7               10.8 +/-    1.11      13.5 +/-    1.11  0.230 / 0.530
G08     123.3          46.0               12.7 +/-    0.97      16.8 +/-    0.97  0.230 / 0.360
G09     253.5          82.8               11.6 +/-    1.19      11.7 +/-    1.19  0.060 / 0.060
G16     43.5           15.9                7.5 +/-    2.81      18.3 +/-    2.81  0.050 / 0.060
G23     148.6          49.8               12.2 +/-    0.70      15.5 +/-    0.70  0.040 / 0.050
G27     68.1           36.1                9.7 +/-    0.91      15.0 +/-    0.91  0.040 / 0.060
G28     228.8          19.9               12.6 +/-    1.73      27.8 +/-    1.73  0.040 / 0.050
G30     293.0          28.5                8.8 +/-    2.02      15.9 +/-    2.02  0.040 / 0.060