PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-13:57:50
G01     122.4          15.2                7.2 +/-    1.89      17.9 +/-    1.89  0.090 / 0.130
G07     75.6           65.6                6.8 +/-    0.52       7.4 +/-    0.52  0.060 / 0.100
G08     46.4           33.3                4.7 +/-    1.42       7.7 +/-    1.42  0.030 / 0.030
G09     176.2          29.0                7.8 +/-    1.39      13.9 +/-    1.39  0.040 / 0.030
G11     108.7          36.6                7.2 +/-    0.63      11.1 +/-    0.63  0.080 / 0.360
G13     320.3          14.3                4.0 +/-    3.06      10.2 +/-    3.06  0.230 / 0.370
G17     200.0          22.6                7.4 +/-    1.23      15.3 +/-    1.23  0.030 / 0.020
G28     285.4          55.4                6.4 +/-    2.20       7.6 +/-    2.20  0.030 / 0.020
G30     336.5          62.8                6.0 +/-    0.66       6.7 +/-    0.66  0.190 / 0.270