PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-20:27:50
G05     53.3           10.3               16.5 +/-    1.93      45.9 +/-    1.93  0.130 / 0.300
G10     245.1          20.9               20.0 +/-    2.23      43.0 +/-    2.23  0.130 / 0.270
G13     61.8           34.6               16.1 +/-    0.84      25.8 +/-    0.84  0.060 / 0.050
G15     100.7          57.4               18.6 +/-    0.64      21.6 +/-    0.64  0.040 / 0.060
G16     306.1          13.4               13.7 +/-    1.51      35.4 +/-    1.51  0.140 / 0.400
G18     259.9          51.8               18.5 +/-    0.75      22.8 +/-    0.75  0.130 / 0.340
G20     37.9           54.5               15.9 +/-    1.13      19.1 +/-    1.13  0.110 / 0.330
G21     327.5          56.8               16.0 +/-    0.79      18.8 +/-    0.79  0.120 / 0.320
G26     278.6          17.3               15.2 +/-    1.41      35.7 +/-    1.41  0.050 / 0.120
G29     160.4          52.9               19.1 +/-    1.50      23.3 +/-    1.50  0.050 / 0.130