PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-14:43:00
G03     236.5          69.0                9.7 +/-    0.39      10.4 +/-    0.39  0.030 / 0.040
G09     302.2          16.3                6.4 +/-    1.14      15.5 +/-    1.14  0.030 / 0.040
G14     97.0           18.8                7.3 +/-    1.23      16.5 +/-    1.23  0.090 / 0.230
G16     127.4          58.0                9.8 +/-    0.48      11.3 +/-    0.48  0.080 / 0.240
G22     189.2          53.7               10.1 +/-    0.84      12.2 +/-    0.84  0.050 / 0.050
G23     321.6          51.7                8.4 +/-    1.35      10.4 +/-    1.35  0.050 / 0.050
G26     69.8           51.2                7.5 +/-    0.72       9.3 +/-    0.72  0.060 / 0.060
G31     51.9           19.2                6.0 +/-    2.07      13.5 +/-    2.07  0.050 / 0.050