PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-08:12:30
G08     299.8          21.0                4.8 +/-    1.80      10.3 +/-    1.80  0.060 / 0.130
G10     359.3          62.8                3.7 +/-    0.47       4.2 +/-    0.47  0.070 / 0.130
G14     226.8          38.8                6.8 +/-    2.31      10.1 +/-    2.31  0.060 / 0.110
G20     80.4           32.7                3.8 +/-    0.91       6.2 +/-    0.91  0.080 / 0.120
G21     144.6          44.1                6.7 +/-    1.44       9.1 +/-    1.44  0.070 / 0.110
G24     59.2           26.9                3.0 +/-    0.96       5.5 +/-    0.96  0.070 / 0.100
G27     257.7          33.2                6.1 +/-    1.86       9.9 +/-    1.86  0.030 / 0.030
G32     240.8          66.7                6.2 +/-    0.45       6.7 +/-    0.45  0.030 / 0.030