PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-23:57:40
G10     254.7          29.1               12.6 +/-    1.35      22.5 +/-    1.35  0.130 / 0.240
G13     50.5           28.5                7.1 +/-    1.21      12.8 +/-    1.21  0.150 / 0.220
G15     79.8           57.1               10.3 +/-    0.45      12.1 +/-    0.45  0.080 / 0.120
G16     293.0          14.1                9.7 +/-    1.64      24.6 +/-    1.64  0.090 / 0.140
G18     275.6          58.0               12.2 +/-    0.63      14.1 +/-    0.63  0.030 / 0.090
G20     46.7           43.4                8.9 +/-    0.64      12.3 +/-    0.64  0.030 / 0.070
G21     340.1          63.8               10.6 +/-    0.58      11.7 +/-    0.58  0.050 / 0.080
G26     265.6          13.5               12.4 +/-    1.17      31.9 +/-    1.17  0.040 / 0.070
G29     165.0          41.9               12.2 +/-    1.46      17.2 +/-    1.46  0.060 / 0.090