PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/12-08:42:20
G10     293.5          50.3                4.6 +/-    3.09       5.8 +/-    3.09  0.060 / 0.080
G15     46.4           29.6                3.3 +/-    0.98       5.9 +/-    0.98  0.050 / 0.090
G20     55.8           42.7                3.5 +/-    1.27       4.9 +/-    1.27  0.070 / 0.130
G21     88.5           75.2                6.1 +/-    0.47       6.3 +/-    0.47  0.070 / 0.100
G24     100.4          25.5                6.3 +/-    1.46      12.1 +/-    1.46  0.050 / 0.080
G27     302.4          33.5                3.5 +/-    3.27       5.7 +/-    3.27  0.050 / 0.060
G32     209.4          31.0                6.6 +/-    1.20      11.2 +/-    1.20  0.050 / 0.040