PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-07:28:00
G08     295.5          21.8                4.8 +/-    2.37      10.1 +/-    2.37  0.050 / 0.090
G10     7.6            63.0                2.9 +/-    0.68       3.3 +/-    0.68  0.040 / 0.090
G14     229.7          41.9                7.5 +/-    0.94      10.6 +/-    0.94  0.050 / 0.110
G20     79.8           37.0                3.5 +/-    1.05       5.3 +/-    1.05  0.060 / 0.110
G21     146.7          40.6                6.6 +/-    1.37       9.5 +/-    1.37  0.090 / 0.110
G24     55.6           25.3                2.8 +/-    1.78       5.4 +/-    1.78  0.090 / 0.120
G27     253.7          31.4                7.5 +/-    1.02      12.8 +/-    1.02  0.030 / 0.040
G32     248.5          69.8                7.0 +/-    1.22       7.4 +/-    1.22  0.040 / 0.030