PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/16-21:27:30
G03     251.3          69.7                9.4 +/-    0.52      10.0 +/-    0.52  0.040 / 0.050
G09     303.4          21.0                7.9 +/-    2.10      17.1 +/-    2.10  0.040 / 0.050
G14     95.4           19.7                8.8 +/-    2.22      19.5 +/-    2.22  0.110 / 0.280
G16     127.9          56.3               10.1 +/-    1.18      11.8 +/-    1.18  0.100 / 0.300
G22     199.9          58.7                8.5 +/-    0.47       9.8 +/-    0.47  0.050 / 0.070
G23     316.6          46.3                7.6 +/-    1.03      10.0 +/-    1.03  0.050 / 0.070
G26     74.5           52.9                6.6 +/-    0.76       8.0 +/-    0.76  0.030 / 0.030
G31     50.8           22.2                6.0 +/-    3.15      12.6 +/-    3.15  0.030 / 0.030