PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-18:57:50
G02     52.6           39.0               17.9 +/-    0.77      26.5 +/-    0.77  0.050 / 0.070
G05     84.1           70.8               18.2 +/-    0.41      19.1 +/-    0.41  0.070 / 0.070
G12     187.1          41.2               18.0 +/-    1.51      25.6 +/-    1.51  0.180 / 0.410
G20     203.7          51.8               18.0 +/-    2.03      22.2 +/-    2.03  0.180 / 0.360
G21     265.1          13.3               13.9 +/-   12.88      36.0 +/-   12.88  0.050 / 0.060
G25     243.9          56.4               18.8 +/-    0.98      22.1 +/-    0.98  0.040 / 0.050
G29     325.7          50.6               16.7 +/-    0.92      20.9 +/-    0.92  0.020 / 0.030