PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-20:42:30
G10     252.0          27.0               20.5 +/-    1.49      38.3 +/-    1.49  0.080 / 0.180
G13     53.1           30.4               11.9 +/-    1.90      20.6 +/-    1.90  0.060 / 0.100
G15     83.0           56.9               13.9 +/-    0.86      16.2 +/-    0.86  0.040 / 0.050
G16     297.9          13.8               17.0 +/-    2.09      43.6 +/-    2.09  0.030 / 0.040
G18     272.1          57.3               18.0 +/-    1.70      21.0 +/-    1.70  0.130 / 0.230
G20     43.9           47.1               13.1 +/-    1.23      17.2 +/-    1.23  0.170 / 0.270
G21     338.3          62.7               17.9 +/-    0.66      19.8 +/-    0.66  0.060 / 0.050
G26     270.4          14.6               20.6 +/-    1.09      51.8 +/-    1.09  0.050 / 0.060
G29     163.2          43.3               17.4 +/-    0.54      24.0 +/-    0.54  0.040 / 0.040