PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-18:43:00
G02     50.2           41.0               14.5 +/-    0.42      20.8 +/-    0.42  0.060 / 0.080
G05     94.2           71.5               15.0 +/-    0.56      15.7 +/-    0.56  0.040 / 0.060
G12     187.9          44.6               16.9 +/-    1.33      22.9 +/-    1.33  0.040 / 0.060
G20     202.6          48.5               20.1 +/-    1.34      25.9 +/-    1.34  0.060 / 0.060
G21     262.8          11.5               14.2 +/-    2.89      38.4 +/-    2.89  0.140 / 0.550
G25     249.9          57.9               17.2 +/-    0.72      19.9 +/-    0.72  0.190 / 0.560
G29     323.6          48.0               14.5 +/-    1.17      18.7 +/-    1.17  0.030 / 0.030