PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-18:43:10
G02     75.8           19.8               13.1 +/-    0.99      28.9 +/-    0.99  0.110 / 0.150
G05     45.3           46.0               13.7 +/-    0.64      18.3 +/-    0.64  0.090 / 0.180
G12     181.1          12.9               19.2 +/-    2.79      50.3 +/-    2.79  0.160 / 0.140
G13     112.2          28.4               17.2 +/-    1.08      31.1 +/-    1.08  0.120 / 0.130
G15     152.0          28.9               18.0 +/-    0.84      32.2 +/-    0.84  0.110 / 0.200
G18     225.5          18.8               20.1 +/-    4.31      45.5 +/-    4.31  0.160 / 0.250
G20     237.8          82.1               16.2 +/-    0.61      16.3 +/-    0.61  0.040 / 0.050
G21     288.6          31.0               15.5 +/-    1.57      26.6 +/-    1.57  0.030 / 0.050
G25     213.0          33.6               15.6 +/-    1.89      25.4 +/-    1.89  0.040 / 0.030
G29     358.1          79.3               15.3 +/-    0.35      15.5 +/-    0.35  0.050 / 0.030