PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-07:58:00
G08     299.0          21.3                3.4 +/-    1.82       7.2 +/-    1.82  0.060 / 0.130
G10     0.7            62.8                3.5 +/-    0.42       3.9 +/-    0.42  0.060 / 0.170
G14     227.2          39.2                5.2 +/-    2.51       7.6 +/-    2.51  0.070 / 0.120
G20     79.8           34.3                3.3 +/-    0.94       5.3 +/-    0.94  0.080 / 0.120
G21     145.0          43.5                7.2 +/-    0.79       9.9 +/-    0.79  0.030 / 0.030
G24     58.6           26.7                3.5 +/-    1.15       6.6 +/-    1.15  0.030 / 0.030
G27     257.0          33.0                5.2 +/-    1.86       8.6 +/-    1.86  0.060 / 0.100
G32     241.9          67.2                5.6 +/-    0.66       6.0 +/-    0.66  0.060 / 0.110