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                5.6 +/-    0.62       9.4 +/-    0.62  0.030 / 0.040
G07     125.8          43.0                6.5 +/-    1.28       9.1 +/-    1.28  0.030 / 0.030
G11     67.3           37.7                4.8 +/-    0.63       7.2 +/-    0.63  0.050 / 0.050
G13     296.7          34.6                5.2 +/-    0.86       8.3 +/-    0.86  0.030 / 0.060
G17     214.2          56.3                7.1 +/-    0.99       8.4 +/-    0.99  0.070 / 0.120
G19     214.5          28.9                5.7 +/-    0.96      10.2 +/-    0.96  0.070 / 0.100
G28     350.1          61.6                4.6 +/-    0.46       5.1 +/-    0.46  0.060 / 0.050
G30     99.0           77.3                5.5 +/-    0.64       5.6 +/-    0.64  0.040 / 0.060