PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-18:12:30
G05     46.4           25.6               15.7 +/-    0.99      30.4 +/-    0.99  0.050 / 0.130
G13     87.3           36.9               17.3 +/-    0.71      26.5 +/-    0.71  0.050 / 0.110
G15     133.3          47.0               19.9 +/-    1.51      26.1 +/-    1.51  0.030 / 0.040
G18     239.2          37.0               17.6 +/-    1.53      27.0 +/-    1.53  0.030 / 0.040
G20     17.9           74.3               17.7 +/-    0.75      18.3 +/-    0.75  0.040 / 0.090
G21     307.9          44.4               16.5 +/-    1.47      22.4 +/-    1.47  0.050 / 0.090
G25     201.8          15.6               21.2 +/-    1.96      51.9 +/-    1.96  0.100 / 0.220
G29     143.9          74.4               18.3 +/-    0.64      18.9 +/-    0.64  0.180 / 0.280