PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-13:43:00
G01     121.9          15.5                7.7 +/-    2.15      19.0 +/-    2.15  0.070 / 0.120
G07     76.9           65.4               14.8 +/-   25.78      16.1 +/-   25.78  0.070 / 0.280
G08     46.1           32.8                3.9 +/-    1.98       6.4 +/-    1.98  0.040 / 0.030
G09     176.0          28.2               11.9 +/-   24.62      21.6 +/-   24.62  0.040 / 0.270
G11     108.1          36.9               12.8 +/-   26.12      19.6 +/-   26.12  0.040 / 0.030
G13     320.1          14.7                3.7 +/-    4.06       9.2 +/-    4.06  0.030 / 0.300
G17     200.2          23.2               11.0 +/-   22.94      22.3 +/-   22.94  0.150 / 0.400
G28     286.5          55.7               14.5 +/-   26.92      17.1 +/-   26.92  0.110 / 0.280
G30     337.3          63.4               14.1 +/-   25.77      15.6 +/-   25.77  0.210 / 0.220