PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-19:28:00
G10     251.0          28.8               12.4 +/-    1.15      22.2 +/-    1.15  0.040 / 0.050
G13     52.5           28.4                8.2 +/-    0.68      14.9 +/-    0.68  0.040 / 0.050
G15     85.8           57.7               11.4 +/-    0.53      13.2 +/-    0.53  0.060 / 0.160
G16     294.8          15.9                8.7 +/-   13.12      21.2 +/-   13.12  0.060 / 0.180
G20     271.8          52.0               12.3 +/-    1.24      15.1 +/-    1.24  0.310 / 0.980
G21     334.0          59.7               11.0 +/-    0.68      12.5 +/-    0.68  0.350 / 0.840
G26     267.6          15.3               10.7 +/-    2.00      26.5 +/-    2.00  0.030 / 0.050
G29     163.8          50.2               11.8 +/-    3.11      14.8 +/-    3.11  0.030 / 0.040