PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/11-13:27:50
G01     108.1          24.7                5.4 +/-    1.28      10.7 +/-    1.28  0.030 / 0.040
G07     106.5          56.1                6.7 +/-    0.69       7.8 +/-    0.69  0.030 / 0.050
G08     41.9           19.7                4.6 +/-    1.40      10.1 +/-    1.40  0.070 / 0.250
G11     88.2           40.7                6.1 +/-    0.77       8.8 +/-    0.77  0.070 / 0.250
G13     312.0          26.0                5.1 +/-    1.19       9.7 +/-    1.19  0.030 / 0.040
G17     204.6          39.0                7.3 +/-    1.94      10.9 +/-    1.94  0.030 / 0.030
G19     208.4          13.3                4.9 +/-    1.32      12.8 +/-    1.32  0.050 / 0.080
G28     315.5          60.6                6.1 +/-    0.55       6.9 +/-    0.55  0.040 / 0.080
G30     8.5            76.0                6.6 +/-    0.33       6.7 +/-    0.33  0.080 / 0.160