PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-19:12:40
G10     249.0          24.5               13.5 +/-    1.77      26.6 +/-    1.77  0.040 / 0.070
G13     56.5           32.3               12.4 +/-    0.73      20.8 +/-    0.73  0.040 / 0.060
G15     89.4           57.3               13.9 +/-    0.76      16.2 +/-    0.76  0.040 / 0.050
G16     302.4          13.4               10.7 +/-    1.59      27.6 +/-    1.59  0.050 / 0.050
G18     267.0          55.5               13.8 +/-    0.62      16.3 +/-    0.62  0.180 / 0.340
G20     40.9           50.8               11.6 +/-    0.34      14.4 +/-    0.34  0.180 / 0.380
G21     334.8          60.8               13.7 +/-    1.04      15.5 +/-    1.04  0.050 / 0.130
G26     274.9          15.7               11.4 +/-    2.02      27.8 +/-    2.02  0.050 / 0.130
G29     161.5          46.3               14.0 +/-    0.68      18.5 +/-    0.68  0.140 / 0.320