PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-05:28:00
G10     265.2          37.0               10.8 +/-    1.12      16.5 +/-    1.12  0.120 / 0.330
G13     42.8           19.8                5.6 +/-    0.92      12.4 +/-    0.92  0.150 / 0.320
G15     61.0           50.0                7.7 +/-    0.86       9.7 +/-    0.86  0.110 / 0.110
G16     279.8          12.6                9.4 +/-    1.73      24.8 +/-    1.73  0.110 / 0.140
G20     343.2          68.7                7.1 +/-    0.47       7.6 +/-    0.47  0.080 / 0.080
G21     357.8          70.6                7.8 +/-    0.60       8.2 +/-    0.60  0.080 / 0.090
G24     121.5          13.2                6.1 +/-    1.23      15.8 +/-    1.23  0.050 / 0.050
G27     319.2          17.9                7.3 +/-    1.70      16.8 +/-    1.70  0.040 / 0.050
G29     168.1          33.4                8.0 +/-    1.38      13.1 +/-    1.38  0.110 / 0.330