PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-20:58:00
G01     76.5           33.3               11.1 +/-    1.35      18.3 +/-    1.35  0.340 / 0.280
G07     134.5          35.9               13.0 +/-    1.13      20.3 +/-    1.13  0.120 / 0.210
G11     58.5           35.0               11.2 +/-    0.84      17.8 +/-    0.84  0.080 / 0.260
G13     281.0          37.7               10.7 +/-    2.04      16.1 +/-    2.04  0.110 / 0.280
G15     306.7          14.2                8.6 +/-    3.47      21.7 +/-    3.47  0.110 / 0.110
G17     225.6          60.0               13.2 +/-    1.55      15.0 +/-    1.55  0.110 / 0.090
G18     53.4           20.7               10.4 +/-    6.40      22.5 +/-    6.40  0.050 / 0.060
G19     220.9          36.7               13.7 +/-    1.45      21.1 +/-    1.45  0.080 / 0.070
G28     11.7           60.2               11.6 +/-    1.68      13.1 +/-    1.68  0.020 / 0.030
G30     129.8          64.7               13.0 +/-    0.54      14.2 +/-    0.54  0.030 / 0.030