PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-18:27:50
G02     58.3           34.0               11.5 +/-    1.78      18.7 +/-    1.78  0.070 / 0.050
G05     65.1           66.4               13.1 +/-    0.62      14.1 +/-    0.62  0.050 / 0.060
G12     185.8          34.2               12.9 +/-    1.15      20.8 +/-    1.15  0.090 / 0.190
G13     130.9          14.1               14.0 +/-    2.24      35.4 +/-    2.24  0.120 / 0.170
G15     164.6          10.8                1.8 +/-   28.82       4.9 +/-   28.82  0.090 / 0.100
G20     206.8          58.9               14.0 +/-    0.71      16.0 +/-    0.71  0.070 / 0.080
G21     270.5          17.8               13.1 +/-    2.71      30.6 +/-    2.71  0.030 / 0.020
G25     233.8          52.2               14.2 +/-    2.83      17.4 +/-    2.83  0.030 / 0.030
G29     330.9          57.3               12.4 +/-    0.83      14.4 +/-    0.83  0.180 / 0.470