PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-20:57:40
G10     253.6          29.3               13.6 +/-    2.56      24.2 +/-    2.56  0.100 / 0.360
G13     50.5           27.7                9.3 +/-    1.99      17.1 +/-    1.99  0.100 / 0.410
G15     89.2           60.1               11.1 +/-    0.37      12.6 +/-    0.37  0.100 / 0.120
G16     291.6          15.4                9.9 +/-    1.40      24.4 +/-    1.40  0.090 / 0.150
G20     274.5          52.9               11.0 +/-    3.20      13.4 +/-    3.20  0.050 / 0.040
G21     338.2          62.5               10.5 +/-    0.92      11.7 +/-    0.92  0.050 / 0.040
G26     264.3          14.2               13.4 +/-    1.78      33.9 +/-    1.78  0.110 / 0.240
G29     165.7          46.8               12.2 +/-    0.71      16.1 +/-    0.71  0.100 / 0.200