PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-12:42:50
G01     222.3          13.0                6.4 +/-    3.35      16.7 +/-    3.35  0.130 / 0.240
G03     265.9          70.6                8.3 +/-    1.00       8.7 +/-    1.00  0.150 / 0.240
G09     297.6          11.2               -6.8 +/-   25.28     -18.6 +/-   25.28  0.040 / 0.040
G16     138.2          51.5               10.8 +/-    0.51      13.3 +/-    0.51  0.030 / 0.040
G22     196.7          62.9                9.3 +/-    1.14      10.3 +/-    1.14  0.050 / 0.050
G23     314.8          45.4                7.2 +/-    0.72       9.6 +/-    0.72  0.050 / 0.060
G26     82.9           53.4                8.3 +/-    0.77      10.0 +/-    0.77  0.040 / 0.030
G31     48.3           25.2                7.1 +/-    1.48      13.8 +/-    1.48  0.050 / 0.040