PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-20:27:10
G02     40.8           49.4                9.9 +/-    0.90      12.6 +/-    0.90  0.040 / 0.080
G05     126.0          69.1               10.5 +/-    0.96      11.2 +/-    0.96  0.040 / 0.060
G12     190.1          54.7               11.7 +/-    0.89      14.0 +/-    0.89  0.040 / 0.050
G20     199.6          38.7               13.6 +/-    1.98      20.2 +/-    1.98  0.040 / 0.050
G25     268.2          60.5               10.6 +/-    1.10      11.9 +/-    1.10  0.040 / 0.090
G29     316.1          38.5               10.7 +/-    1.66      16.0 +/-    1.66  0.040 / 0.090