PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/19-21:27:30
G10     251.5          29.0               12.9 +/-    1.56      23.1 +/-    1.56  0.040 / 0.050
G13     52.0           28.1                7.5 +/-    2.41      13.7 +/-    2.41  0.040 / 0.040
G15     84.8           57.6               11.3 +/-    0.68      13.1 +/-    0.68  0.060 / 0.210
G16     294.7          15.7                9.3 +/-    1.72      22.6 +/-    1.72  0.100 / 0.180
G20     271.9          51.7               11.8 +/-    2.78      14.6 +/-    2.78  0.030 / 0.030
G21     334.5          60.1               11.0 +/-    0.65      12.5 +/-    0.65  0.040 / 0.050
G26     267.2          15.1               11.3 +/-    2.45      28.2 +/-    2.45  0.180 / 0.370
G29     163.8          49.0               11.7 +/-    0.55      14.9 +/-    0.55  0.120 / 0.360