PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/26-19:57:40
G10     254.1          29.8               12.9 +/-    1.11      22.6 +/-    1.11  0.160 / 0.510
G13     50.0           27.2               10.6 +/-    2.19      19.8 +/-    2.19  0.200 / 0.660
G15     86.2           59.5               11.6 +/-    0.68      13.3 +/-    0.68  0.040 / 0.050
G16     291.2          15.3                7.9 +/-    4.72      19.5 +/-    4.72  0.050 / 0.050
G20     275.5          53.4               13.2 +/-    1.67      16.0 +/-    1.67  0.100 / 0.190
G21     339.6          63.1               10.8 +/-    1.15      12.0 +/-    1.15  0.080 / 0.200
G26     264.1          13.9               10.7 +/-    2.22      27.2 +/-    2.22  0.030 / 0.040
G29     165.7          45.8               12.7 +/-    0.96      16.9 +/-    0.96  0.030 / 0.040