PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-17:57:50
G02     59.5           32.9               13.3 +/-    0.54      22.0 +/-    0.54  0.050 / 0.090
G05     62.2           65.0               14.4 +/-    0.45      15.8 +/-    0.45  0.100 / 0.100
G12     185.7          33.1               16.4 +/-    1.77      26.9 +/-    1.77  0.130 / 0.280
G13     130.0          15.0               21.1 +/-    1.64      52.6 +/-    1.64  0.120 / 0.220
G15     163.8          11.9               19.8 +/-    2.61      52.9 +/-    2.61  0.050 / 0.080
G20     207.6          60.0               19.0 +/-    0.86      21.6 +/-    0.86  0.040 / 0.080
G21     271.6          18.8               15.5 +/-    1.57      35.1 +/-    1.57  0.020 / 0.040
G25     232.7          51.4               14.7 +/-    1.60      18.2 +/-    1.60  0.030 / 0.030
G29     332.3          58.8               13.2 +/-    0.60      15.2 +/-    0.60  0.190 / 0.320