PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-23:27:40
G10     291.0          49.0               20.9 +/-    1.29      26.7 +/-    1.29  0.060 / 0.160
G15     47.0           32.5               20.1 +/-    0.84      33.4 +/-    0.84  0.070 / 0.130
G18     348.1          66.6               20.2 +/-    1.11      21.8 +/-    1.11  0.050 / 0.040
G20     68.9           20.0               19.7 +/-    1.39      43.4 +/-    1.39  0.040 / 0.040
G21     84.8           75.3               22.3 +/-    0.44      23.0 +/-    0.44  0.080 / 0.130
G24     103.2          24.8               22.7 +/-    1.34      44.4 +/-    1.34  0.070 / 0.130
G27     302.9          33.4               21.9 +/-    1.04      35.8 +/-    1.04  0.090 / 0.300
G32     209.8          26.1               23.8 +/-    0.81      45.5 +/-    0.81  0.110 / 0.230