PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-22:13:10
G02     50.8           41.3               10.6 +/-    1.56      15.1 +/-    1.56  0.040 / 0.050
G05     80.6           69.6               13.0 +/-    0.40      13.7 +/-    0.40  0.040 / 0.050
G12     185.8          40.0               15.6 +/-    1.31      22.6 +/-    1.31  0.020 / 0.030
G20     202.9          52.7               15.6 +/-    1.02      19.1 +/-    1.02  0.020 / 0.040
G21     264.5          12.2               15.2 +/-    2.01      40.3 +/-    2.01  0.160 / 0.460
G25     241.4          56.5               15.0 +/-    0.68      17.6 +/-    0.68  0.210 / 0.550
G29     324.0          48.6               12.9 +/-    1.10      16.5 +/-    1.10  0.030 / 0.060