PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/16-16:58:00
G08     271.3          20.5                6.4 +/-    1.80      13.9 +/-    1.80  0.380 / 0.460
G10     54.4           58.6                7.8 +/-    0.50       8.9 +/-    0.50  0.300 / 0.430
G14     251.7          59.2                8.2 +/-    1.06       9.4 +/-    1.06  0.040 / 0.050
G20     92.4           36.7                7.4 +/-    0.83      11.3 +/-    0.83  0.040 / 0.050
G21     153.9          19.5                7.6 +/-    3.05      17.0 +/-    3.05  0.020 / 0.030
G24     42.7           14.4                5.5 +/-    2.93      13.8 +/-    2.93  0.030 / 0.020
G27     235.4          19.8                7.8 +/-    3.86      17.2 +/-    3.86  0.110 / 0.320
G31     179.8          24.4                9.7 +/-    1.92      19.2 +/-    1.92  0.140 / 0.250
G32     326.7          76.4                7.5 +/-    0.89       7.7 +/-    0.89  0.190 / 0.350