PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-20:42:30
G01     302.1          36.1               11.9 +/-    2.35      18.6 +/-    2.35  0.110 / 0.110
G10     111.2          36.8               12.3 +/-    1.45      18.9 +/-    1.45  0.080 / 0.110
G11     276.5          28.1               10.6 +/-    1.54      19.3 +/-    1.54  0.030 / 0.020
G14     8.4            64.1               10.3 +/-    0.31      11.3 +/-    0.31  0.030 / 0.030
G22     311.2          29.5                9.3 +/-    1.40      16.5 +/-    1.40  0.110 / 0.150
G25     76.5           17.8               12.2 +/-    2.27      28.4 +/-    2.27  0.100 / 0.160
G31     165.3          69.4               13.6 +/-    0.39      14.4 +/-    0.39  0.050 / 0.040
G32     40.7           49.5                9.5 +/-    1.94      12.1 +/-    1.94  0.040 / 0.040