PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-07:27:40
G03     195.0          27.4               20.0 +/-   16.67      37.0 +/-   16.67  0.050 / 0.120
G07     286.7          36.3               21.4 +/-   18.19      33.1 +/-   18.19  0.050 / 0.090
G08     142.9          24.8               18.0 +/-   16.87      35.4 +/-   16.87  0.040 / 0.050
G09     321.9          60.4                3.9 +/-    2.72       4.4 +/-    2.72  0.040 / 0.030
G16     45.0           46.8               23.8 +/-   17.28      31.3 +/-   17.28  0.120 / 0.340
G22     178.8          11.4                3.5 +/-    2.79       9.4 +/-    2.79  0.140 / 0.310
G23     69.2           83.7                1.6 +/-    2.27       1.6 +/-    2.27  0.040 / 0.060
G26     43.1           18.9                2.0 +/-    0.67       4.6 +/-    0.67  0.040 / 0.070
G27     103.7          31.5               20.4 +/-   16.50      34.6 +/-   16.50  0.050 / 0.080