PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/22-20:27:50
G10     259.9          33.9                8.6 +/-    1.33      13.9 +/-    1.33  0.130 / 0.280
G13     45.6           23.2                6.8 +/-    1.20      14.0 +/-    1.20  0.160 / 0.210
G15     74.3           57.5                8.5 +/-    0.49       9.9 +/-    0.49  0.040 / 0.050
G16     285.1          14.2                7.4 +/-    2.28      18.9 +/-    2.28  0.050 / 0.050
G20     285.0          56.9                8.8 +/-    1.19      10.3 +/-    1.19  0.120 / 0.330
G21     349.0          67.3                7.8 +/-    0.99       8.4 +/-    0.99  0.130 / 0.360
G24     123.6          10.5               -4.6 +/-   41.39     -12.8 +/-   41.39  0.080 / 0.250
G26     258.5          11.1                9.0 +/-    2.35      24.6 +/-    2.35  0.070 / 0.290
G27     321.6          12.3                5.9 +/-    3.63      15.6 +/-    3.63  0.160 / 0.380
G29     167.0          39.1               11.1 +/-    0.89      16.4 +/-    0.89  0.140 / 0.340