PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/06-20:58:00
G02     41.0           49.3               12.0 +/-    0.66      15.3 +/-    0.66  0.040 / 0.070
G05     122.8          69.4               14.2 +/-    0.48      15.0 +/-    0.48  0.040 / 0.080
G12     189.6          53.8               15.3 +/-    1.73      18.4 +/-    1.73  0.040 / 0.050
G20     199.6          39.5               17.2 +/-    1.64      25.2 +/-    1.64  0.030 / 0.060
G25     266.1          60.6               15.1 +/-    0.78      17.1 +/-    0.78  0.060 / 0.060
G29     316.3          38.8               14.1 +/-    1.41      21.0 +/-    1.41  0.070 / 0.060