PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/20-18:43:10
G10     264.8          37.2                9.5 +/-    1.35      14.6 +/-    1.35  0.130 / 0.370
G13     42.8           19.6                8.3 +/-    1.09      18.3 +/-    1.09  0.160 / 0.330
G15     64.8           53.5                8.7 +/-    0.77      10.6 +/-    0.77  0.040 / 0.040
G16     281.1          12.9                8.3 +/-    1.58      21.7 +/-    1.58  0.040 / 0.040
G20     293.5          59.3               10.1 +/-    1.08      11.5 +/-    1.08  0.130 / 0.370
G21     0.6            70.9                9.9 +/-    0.86      10.5 +/-    0.86  0.130 / 0.340
G24     119.0          13.3               10.7 +/-    1.80      27.6 +/-    1.80  0.090 / 0.280
G27     320.2          15.8                7.1 +/-    2.78      17.4 +/-    2.78  0.080 / 0.250
G29     167.4          33.5               11.1 +/-    2.05      18.2 +/-    2.05  0.120 / 0.360