PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-22:27:50
G10     267.3          37.6               14.4 +/-    1.39      21.7 +/-    1.39  0.120 / 0.070
G13     42.4           19.6               12.0 +/-    2.58      26.6 +/-    2.58  0.050 / 0.050
G15     59.2           48.9               14.6 +/-    0.58      18.7 +/-    0.58  0.030 / 0.040
G16     281.8          11.1               15.1 +/-    1.22      41.2 +/-    1.22  0.030 / 0.030
G18     301.5          64.4               14.1 +/-    0.69      15.4 +/-    0.69  0.150 / 0.250
G20     55.1           33.9               13.0 +/-    1.59      21.1 +/-    1.59  0.140 / 0.290
G21     7.4            72.7               14.4 +/-    0.77      15.0 +/-    0.77  0.050 / 0.080
G24     121.1          14.2               18.1 +/-    1.72      45.8 +/-    1.72  0.070 / 0.100
G27     317.5          20.7               13.7 +/-    2.43      29.8 +/-    2.43  0.250 / 0.240
G29     166.5          27.1               16.9 +/-    1.56      31.6 +/-    1.56  0.150 / 0.250