PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-16:57:20
G02     32.4           56.4               15.4 +/-    0.76      18.1 +/-    0.76  0.030 / 0.040
G05     148.3          60.0               21.0 +/-    0.66      23.9 +/-    0.66  0.050 / 0.050
G06     53.3           17.5               13.2 +/-    0.55      30.9 +/-    0.55  0.040 / 0.050
G12     201.6          68.6               15.9 +/-    1.32      17.0 +/-    1.32  0.040 / 0.050
G20     198.3          25.9               20.7 +/-    2.08      39.7 +/-    2.08  0.030 / 0.040
G25     294.8          55.4               14.0 +/-    1.24      16.6 +/-    1.24  0.030 / 0.040
G29     309.1          31.4               12.3 +/-    0.84      21.0 +/-    0.84  0.070 / 0.120