PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/21-19:12:30
G10     251.5          29.2               11.4 +/-    2.09      20.2 +/-    2.09  0.040 / 0.050
G13     52.0           28.1                8.1 +/-    2.80      14.8 +/-    2.80  0.040 / 0.040
G15     84.2           57.4               11.4 +/-    1.07      13.3 +/-    1.07  0.060 / 0.180
G16     294.1          15.8                7.3 +/-    3.10      17.7 +/-    3.10  0.080 / 0.220
G20     272.7          52.5               11.6 +/-    2.64      14.2 +/-    2.64  0.040 / 0.030
G21     334.8          60.2                9.8 +/-    0.64      11.1 +/-    0.64  0.030 / 0.040
G26     267.1          15.1                8.2 +/-    2.61      20.4 +/-    2.61  0.210 / 0.340
G29     164.0          49.6               12.5 +/-    0.73      15.8 +/-    0.73  0.130 / 0.310