PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-17:27:50
G02     68.0           25.7               14.2 +/-    1.16      27.3 +/-    1.16  0.050 / 0.200
G05     49.5           55.1               13.4 +/-    0.34      15.9 +/-    0.34  0.040 / 0.180
G12     183.7          22.7               15.4 +/-    1.53      31.7 +/-    1.53  0.020 / 0.040
G13     121.5          22.0               19.0 +/-    1.25      39.8 +/-    1.25  0.030 / 0.040
G15     157.8          20.3               17.2 +/-    2.16      37.6 +/-    2.16  0.040 / 0.080
G18     221.0          10.3               -7.5 +/-   12.55     -20.8 +/-   12.55  0.050 / 0.110
G20     215.8          71.0               16.2 +/-    0.59      17.1 +/-    0.59  0.080 / 0.210
G21     280.3          25.4               13.6 +/-    1.26      26.2 +/-    1.26  0.100 / 0.170
G25     221.6          43.0               17.4 +/-    1.96      24.2 +/-    1.96  0.040 / 0.050
G29     342.6          69.6               13.3 +/-    0.93      14.1 +/-    0.93  0.040 / 0.050