PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/15-21:43:10
G10     251.3          28.9                9.9 +/-    1.48      17.7 +/-    1.48  0.140 / 0.380
G13     52.2           28.3                7.0 +/-    2.13      12.7 +/-    2.13  0.120 / 0.430
G15     85.0           57.6                9.5 +/-    1.06      11.1 +/-    1.06  0.040 / 0.050
G16     294.9          15.6                6.5 +/-    1.84      15.8 +/-    1.84  0.040 / 0.040
G20     271.5          51.5                9.0 +/-    3.01      11.2 +/-    3.01  0.080 / 0.160
G21     334.3          60.0                8.5 +/-    1.01       9.7 +/-    1.01  0.060 / 0.200
G26     267.4          15.2                7.7 +/-    1.64      19.2 +/-    1.64  0.030 / 0.040
G29     163.7          49.1               10.1 +/-    0.76      12.8 +/-    0.76  0.040 / 0.040