PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-05:27:50
G10     297.3          51.7                5.8 +/-    2.16       7.2 +/-    2.16  0.040 / 0.030
G15     46.2           28.6                4.3 +/-    1.60       7.8 +/-    1.60  0.040 / 0.030
G20     22.9           62.2                5.6 +/-    1.47       6.3 +/-    1.47  0.060 / 0.080
G21     95.2           74.6                6.6 +/-    0.52       6.8 +/-    0.52  0.070 / 0.070
G24     97.0           26.5                4.6 +/-    1.38       8.7 +/-    1.38  0.080 / 0.110
G27     300.1          34.4                5.2 +/-    1.58       8.4 +/-    1.58  0.100 / 0.140
G32     210.3          33.8                7.9 +/-    1.87      12.8 +/-    1.87  0.050 / 0.140