PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-20:28:00
G05     53.3           10.3               16.8 +/-    3.40      46.5 +/-    3.40  0.090 / 0.230
G10     245.1          20.9               19.3 +/-    2.46      41.5 +/-    2.46  0.110 / 0.250
G13     61.8           34.6               18.9 +/-    0.86      30.2 +/-    0.86  0.240 / 0.260
G15     100.7          57.4               20.6 +/-    0.75      23.9 +/-    0.75  0.210 / 0.310
G16     306.1          13.4               13.1 +/-    1.50      33.8 +/-    1.50  0.060 / 0.040
G18     259.9          51.8               18.5 +/-    2.68      22.8 +/-    2.68  0.040 / 0.040
G20     37.9           54.5               17.0 +/-    1.03      20.4 +/-    1.03  0.040 / 0.040
G21     327.5          56.8               17.3 +/-    0.60      20.3 +/-    0.60  0.040 / 0.050
G26     278.6          17.3               16.3 +/-    0.75      38.4 +/-    0.75  0.290 / 0.290
G29     160.4          52.9               20.2 +/-    0.44      24.7 +/-    0.44  0.310 / 0.470