PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/21-19:43:10
G10     97.9           43.2                9.3 +/-    0.72      12.9 +/-    0.72  0.040 / 0.040
G11     293.6          24.8                9.8 +/-    1.42      19.2 +/-    1.42  0.030 / 0.030
G14     321.0          69.8                9.4 +/-    0.90       9.9 +/-    0.90  0.060 / 0.060
G20     116.3          17.1               10.7 +/-    0.72      25.2 +/-    0.72  0.050 / 0.060
G22     306.9          18.4                9.8 +/-   10.80      22.4 +/-   10.80  0.220 / 0.320
G25     90.1           13.5               12.7 +/-    1.44      32.7 +/-    1.44  0.180 / 0.300
G31     171.2          56.2               11.2 +/-    1.20      13.1 +/-    1.20  0.080 / 0.160
G32     29.3           57.0                9.2 +/-    1.71      10.7 +/-    1.71  0.080 / 0.160