PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-08:27:40
G10     286.8          47.7                5.0 +/-    2.91       6.5 +/-    2.91  0.090 / 0.110
G15     47.7           34.0                5.1 +/-    1.34       8.2 +/-    1.34  0.060 / 0.090
G20     50.6           46.6                4.8 +/-    0.94       6.4 +/-    0.94  0.040 / 0.050
G21     68.0           76.9                6.1 +/-    0.64       6.2 +/-    0.64  0.040 / 0.060
G24     105.4          23.3                5.9 +/-    2.20      12.1 +/-    2.20  0.040 / 0.040
G27     307.1          30.9                5.3 +/-    1.27       9.1 +/-    1.27  0.040 / 0.030
G29     168.6          14.3                5.0 +/-    1.20      12.6 +/-    1.20  0.090 / 0.130
G32     207.7          26.2                5.9 +/-    1.68      11.3 +/-    1.68  0.090 / 0.140