PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/12-17:12:40
G08     272.1          20.6                9.2 +/-    2.63      20.0 +/-    2.63  0.210 / 0.330
G10     53.2           58.8                8.8 +/-    0.54      10.1 +/-    0.54  0.340 / 0.500
G14     250.6          58.6                9.5 +/-    1.05      10.9 +/-    1.05  0.040 / 0.050
G20     91.7           37.2                8.2 +/-    0.57      12.5 +/-    0.57  0.050 / 0.040
G21     153.8          20.2                7.6 +/-    2.75      16.6 +/-    2.75  0.030 / 0.030
G24     43.0           14.9                7.3 +/-    2.63      18.2 +/-    2.63  0.030 / 0.020
G27     235.9          20.2                8.6 +/-    2.82      18.8 +/-    2.82  0.120 / 0.330
G31     179.8          23.9                9.1 +/-    1.04      18.2 +/-    1.04  0.190 / 0.370
G32     323.9          76.6                9.4 +/-    0.69       9.6 +/-    0.69  0.160 / 0.280