PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-19:58:00
G10     258.7          32.1               22.5 +/-    2.12      37.7 +/-    2.12  0.130 / 0.490
G13     47.2           25.6               18.4 +/-    0.87      35.4 +/-    0.87  0.140 / 0.540
G15     69.4           53.7               19.5 +/-    0.31      23.5 +/-    0.31  0.110 / 0.210
G16     291.5          12.9               17.1 +/-    2.77      44.7 +/-    2.77  0.110 / 0.260
G18     285.4          61.5               19.3 +/-    0.79      21.7 +/-    0.79  0.130 / 0.360
G20     48.7           41.4               18.1 +/-    0.74      25.7 +/-    0.74  0.120 / 0.430
G21     351.5          68.0               20.5 +/-    0.78      22.0 +/-    0.78  0.040 / 0.050
G26     264.4          11.5               20.3 +/-    2.01      54.7 +/-    2.01  0.050 / 0.050
G27     320.9          13.8               14.2 +/-    2.29      36.2 +/-    2.29  0.050 / 0.080
G29     164.5          34.6               22.8 +/-    2.60      36.4 +/-    2.60  0.070 / 0.100