PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-08:27:50
G08     271.5          18.4                5.1 +/-    1.01      11.6 +/-    1.01  0.090 / 0.250
G10     58.0           59.1                4.1 +/-    0.82       4.7 +/-    0.82  0.080 / 0.240
G14     258.2          60.8                5.3 +/-    0.41       6.0 +/-    0.41  0.040 / 0.060
G18     313.5          29.6                5.9 +/-    3.19      10.5 +/-    3.19  0.050 / 0.080
G20     101.1          20.8                4.3 +/-    0.82       9.3 +/-    0.82  0.120 / 0.320
G21     154.5          17.2                3.1 +/-    0.86       7.4 +/-    0.86  0.100 / 0.220
G24     40.2           10.9                2.9 +/-    2.40       7.9 +/-    2.40  0.030 / 0.030
G27     232.7          16.8                5.6 +/-    3.48      13.3 +/-    3.48  0.030 / 0.030
G31     177.0          30.6                6.4 +/-    1.30      11.2 +/-    1.30  0.150 / 0.350
G32     340.5          74.5                5.1 +/-    0.74       5.2 +/-    0.74  0.140 / 0.300