PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/20-16:27:30
G10     293.5          51.4                9.3 +/-    2.64      11.5 +/-    2.64  0.080 / 0.100
G15     46.3           28.8                8.1 +/-    1.51      14.5 +/-    1.51  0.080 / 0.080
G20     350.2          65.4                9.3 +/-    0.60      10.1 +/-    0.60  0.190 / 0.300
G21     82.1           75.7                9.3 +/-    0.97       9.5 +/-    0.97  0.260 / 0.320
G24     103.7          25.0               10.4 +/-    1.28      20.2 +/-    1.28  0.040 / 0.030
G27     304.8          32.6                6.9 +/-    2.20      11.4 +/-    2.20  0.040 / 0.040
G29     168.2          12.2                8.3 +/-    1.41      22.0 +/-    1.41  0.120 / 0.080
G32     208.1          29.5               10.8 +/-    1.61      19.2 +/-    1.61  0.110 / 0.070