PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-18:12:30
G02     53.0           38.5               12.4 +/-    0.35      18.5 +/-    0.35  0.210 / 0.300
G05     82.4           70.3               12.7 +/-    0.45      13.4 +/-    0.45  0.140 / 0.250
G12     187.3          41.4               13.2 +/-    1.41      18.8 +/-    1.41  0.060 / 0.080
G20     203.8          51.5               14.3 +/-    1.89      17.7 +/-    1.89  0.060 / 0.070
G21     265.2          13.7               10.2 +/-   11.55      26.1 +/-   11.55  0.040 / 0.060
G25     244.8          56.5               13.4 +/-    0.85      15.7 +/-    0.85  0.040 / 0.050
G29     326.1          51.1               11.2 +/-    0.85      14.0 +/-    0.85  0.030 / 0.040