PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-19:43:00
G05     49.1           17.6                6.6 +/-    0.75      15.5 +/-    0.75  0.080 / 0.140
G10     237.5          14.3               11.8 +/-    2.86      29.9 +/-    2.86  0.070 / 0.150
G13     72.7           35.9                9.9 +/-    1.07      15.5 +/-    1.07  0.040 / 0.070
G15     130.1          53.0               11.0 +/-    0.72      13.4 +/-    0.72  0.040 / 0.060
G16     311.7          13.5                7.1 +/-    1.40      18.4 +/-    1.40  0.110 / 0.360
G20     250.1          38.5               12.7 +/-    1.73      18.9 +/-    1.73  0.130 / 0.410
G21     315.4          48.4                8.7 +/-    0.84      11.2 +/-    0.84  0.050 / 0.120
G26     284.9          20.2                9.0 +/-    1.23      19.7 +/-    1.23  0.050 / 0.110
G29     157.2          70.5               10.9 +/-    0.77      11.5 +/-    0.77  0.040 / 0.040