PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-17:43:00
G01     229.9          20.3               12.1 +/-    2.87      26.5 +/-    2.87  0.030 / 0.030
G03     291.7          68.2               10.9 +/-    0.73      11.6 +/-    0.73  0.030 / 0.030
G14     81.8           28.5               10.4 +/-    1.02      18.9 +/-    1.02  0.100 / 0.180
G16     150.7          40.5               13.3 +/-    1.29      19.1 +/-    1.29  0.110 / 0.130
G22     222.1          73.5               10.4 +/-    0.35      10.8 +/-    0.35  0.050 / 0.060
G23     305.0          35.7               10.8 +/-    1.31      16.9 +/-    1.31  0.060 / 0.100
G26     104.4          52.9               11.8 +/-    0.38      14.4 +/-    0.38  0.050 / 0.070
G31     43.8           35.3                9.8 +/-    1.32      15.4 +/-    1.32  0.040 / 0.080