PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-13:58:00
G01     114.5          20.9                9.8 +/-    1.59      21.1 +/-    1.59  0.140 / 0.170
G07     95.3           60.6               10.6 +/-    1.08      11.9 +/-    1.08  0.120 / 0.160
G08     43.0           25.5                8.9 +/-    2.35      17.2 +/-    2.35  0.030 / 0.040
G09     174.9          19.7                8.8 +/-    1.29      19.5 +/-    1.29  0.030 / 0.040
G11     97.1           39.7               10.2 +/-    0.64      14.9 +/-    0.64  0.030 / 0.030
G13     316.3          21.3                6.9 +/-    2.31      14.7 +/-    2.31  0.040 / 0.030
G17     202.3          31.9               10.8 +/-    0.92      18.1 +/-    0.92  0.190 / 0.350
G28     302.1          58.9                8.6 +/-    1.10       9.8 +/-    1.10  0.120 / 0.200
G30     350.7          70.6                9.2 +/-    0.86       9.6 +/-    0.86  0.100 / 0.080