PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-05:27:40
G10     297.3          51.7                7.1 +/-    0.97       8.8 +/-    0.97  0.040 / 0.040
G15     46.2           28.6                3.4 +/-    0.61       6.1 +/-    0.61  0.040 / 0.040
G20     22.9           62.2                5.3 +/-    0.30       5.9 +/-    0.30  0.050 / 0.080
G21     95.2           74.6                6.8 +/-    0.49       7.0 +/-    0.49  0.080 / 0.090
G24     97.0           26.5                5.9 +/-    0.81      11.2 +/-    0.81  0.040 / 0.040
G27     300.1          34.4                7.4 +/-    1.73      11.8 +/-    1.73  0.040 / 0.040
G32     210.3          33.8                8.6 +/-    2.45      14.0 +/-    2.45  0.040 / 0.110