PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-19:27:50
G10     244.9          23.5               10.5 +/-    2.85      21.3 +/-    2.85  0.040 / 0.070
G13     59.7           32.0               11.1 +/-    0.89      18.6 +/-    0.89  0.050 / 0.070
G15     101.7          57.9               11.9 +/-    0.51      13.7 +/-    0.51  0.050 / 0.130
G16     302.1          15.6                5.6 +/-    4.29      13.7 +/-    4.29  0.050 / 0.150
G20     262.1          47.1               11.6 +/-    1.34      15.1 +/-    1.34  0.130 / 0.580
G21     325.6          54.6               11.1 +/-    0.68      13.3 +/-    0.68  0.140 / 0.850
G26     274.7          17.8                9.3 +/-    1.33      21.7 +/-    1.33  0.030 / 0.040
G29     161.2          58.6               12.5 +/-    0.70      14.4 +/-    0.70  0.030 / 0.050