PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-05:42:50
G10     274.7          42.3                6.2 +/-    1.20       8.7 +/-    1.20  0.040 / 0.040
G13     39.3           13.1                3.9 +/-    2.62      10.0 +/-    2.62  0.050 / 0.040
G15     53.0           43.3                7.0 +/-    1.04       9.7 +/-    1.04  0.100 / 0.100
G20     3.7            66.2                5.1 +/-    0.35       5.5 +/-    0.35  0.100 / 0.120
G21     22.0           75.5                6.1 +/-    0.69       6.3 +/-    0.69  0.160 / 0.340
G24     114.2          18.2                7.0 +/-    1.78      16.0 +/-    1.78  0.080 / 0.350
G27     314.8          24.4                4.3 +/-    1.71       8.5 +/-    1.71  0.090 / 0.170
G29     168.8          24.5                7.9 +/-    1.06      15.6 +/-    1.06  0.090 / 0.140
G32     205.0          17.1                6.8 +/-    2.24      16.0 +/-    2.24  0.110 / 0.150