PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-18:42:40
G05     46.9           23.7               13.3 +/-    1.17      26.8 +/-    1.17  0.130 / 0.240
G13     84.1           37.2               16.1 +/-    0.55      24.5 +/-    0.55  0.110 / 0.170
G15     130.5          48.8               17.7 +/-    1.67      22.6 +/-    1.67  0.070 / 0.130
G18     241.2          38.9               18.6 +/-    1.80      27.6 +/-    1.80  0.080 / 0.130
G20     21.7           71.7               15.5 +/-    0.78      16.2 +/-    0.78  0.160 / 0.340
G21     310.0          45.7               15.0 +/-    1.11      20.1 +/-    1.11  0.150 / 0.410
G25     200.3          13.5               19.6 +/-    3.84      50.5 +/-    3.84  0.040 / 0.080
G26     297.3          18.6               13.8 +/-    1.46      31.5 +/-    1.46  0.050 / 0.080
G29     147.5          72.0               17.4 +/-    1.13      18.2 +/-    1.13  0.040 / 0.050