PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-19:43:10
G10     253.0          27.8               20.8 +/-    1.86      38.2 +/-    1.86  0.100 / 0.250
G13     52.1           29.7               17.6 +/-    0.80      31.0 +/-    0.80  0.100 / 0.260
G15     80.3           56.4               18.9 +/-    0.87      22.3 +/-    0.87  0.100 / 0.330
G16     297.6          13.5               14.4 +/-    1.37      37.0 +/-    1.37  0.080 / 0.320
G18     274.3          58.3               20.4 +/-    0.75      23.5 +/-    0.75  0.040 / 0.040
G20     44.3           46.6               18.0 +/-    0.98      23.7 +/-    0.98  0.040 / 0.050
G21     341.0          63.8               19.9 +/-    0.34      21.9 +/-    0.34  0.040 / 0.060
G26     270.1          14.1               18.6 +/-    2.53      47.3 +/-    2.53  0.040 / 0.070
G29     163.1          41.4               22.0 +/-    0.93      31.3 +/-    0.93  0.060 / 0.140