PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-11:58:00
G01     89.8           31.7                4.8 +/-    1.27       8.2 +/-    1.27  0.060 / 0.100
G07     125.8          43.0                7.9 +/-    0.59      10.9 +/-    0.59  0.060 / 0.120
G11     67.3           37.7                6.2 +/-    0.96       9.3 +/-    0.96  0.030 / 0.050
G13     296.7          34.6                4.2 +/-    3.94       6.6 +/-    3.94  0.030 / 0.040
G17     214.2          56.3                6.9 +/-    0.81       8.1 +/-    0.81  0.020 / 0.020
G19     214.5          28.9                5.0 +/-    1.31       9.0 +/-    1.31  0.020 / 0.020
G28     350.1          61.6                5.3 +/-    0.90       5.9 +/-    0.90  0.040 / 0.050
G30     99.0           77.3                7.5 +/-    0.43       7.7 +/-    0.43  0.040 / 0.040