PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-08:57:40
G08     271.3          18.1                6.0 +/-    2.49      13.8 +/-    2.49  0.040 / 0.050
G10     59.2           58.9                4.1 +/-    0.98       4.7 +/-    0.98  0.040 / 0.060
G14     259.5          61.3                4.8 +/-    1.40       5.4 +/-    1.40  0.240 / 0.180
G18     313.2          30.1                4.3 +/-    1.37       7.5 +/-    1.37  0.260 / 0.260
G20     102.8          16.8                4.0 +/-    1.42       9.5 +/-    1.42  0.160 / 0.260
G21     154.6          16.5                3.7 +/-    2.38       8.9 +/-    2.38  0.180 / 0.300
G24     40.0           10.5                2.9 +/-    3.63       7.9 +/-    3.63  0.080 / 0.280
G27     232.2          16.4                5.7 +/-    1.72      13.7 +/-    1.72  0.110 / 0.330
G31     176.9          31.2                5.7 +/-    1.84       9.7 +/-    1.84  0.110 / 0.220
G32     342.5          74.2                4.7 +/-    0.32       4.9 +/-    0.32  0.100 / 0.200