PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-07:42:30
G08     309.0          18.4                4.3 +/-    1.55       9.9 +/-    1.55  0.070 / 0.210
G10     338.6          60.9                3.6 +/-    0.60       4.1 +/-    0.60  0.090 / 0.190
G14     220.4          29.7                6.8 +/-    1.12      11.9 +/-    1.12  0.040 / 0.030
G20     70.1           39.9                4.2 +/-    0.72       6.1 +/-    0.72  0.040 / 0.030
G21     137.6          53.9                7.5 +/-    0.95       9.1 +/-    0.95  0.060 / 0.090
G24     69.7           29.6                4.1 +/-    0.47       7.2 +/-    0.47  0.080 / 0.080
G27     269.7          36.7                5.8 +/-    1.45       8.9 +/-    1.45  0.070 / 0.110
G32     226.9          57.6                7.8 +/-    0.95       9.1 +/-    0.95  0.060 / 0.090