PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-08:42:40
G02     67.1           25.5                4.6 +/-    2.61       9.0 +/-    2.61  0.050 / 0.040
G05     49.7           52.8                4.9 +/-    1.00       6.0 +/-    1.00  0.050 / 0.040
G12     184.5          25.7                5.9 +/-    1.14      11.4 +/-    1.14  0.040 / 0.050
G13     122.7          20.4                7.6 +/-    3.45      16.5 +/-    3.45  0.040 / 0.040
G15     158.2          19.1                7.4 +/-    0.98      16.6 +/-    0.98  0.140 / 0.190
G20     216.2          62.7                8.1 +/-    1.06       9.0 +/-    1.06  0.160 / 0.120
G21     278.5          23.9                3.5 +/-    1.22       7.1 +/-    1.22  0.090 / 0.150
G25     227.9          46.0                5.3 +/-    2.78       7.0 +/-    2.78  0.080 / 0.110
G29     335.1          63.7                6.4 +/-    0.84       7.1 +/-    0.84  0.080 / 0.080