PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/11-01:28:10
G02     53.3           37.3               12.3 +/-    1.39      18.7 +/-    1.39  0.060 / 0.050
G05     71.4           65.9               14.3 +/-    0.87      15.5 +/-    0.87  0.060 / 0.060
G12     188.2          43.7               17.6 +/-    1.11      24.2 +/-    1.11  0.220 / 0.290
G21     265.5          13.0               16.6 +/-   20.44      43.4 +/-   20.44  0.220 / 0.250
G25     249.9          56.7               15.4 +/-    1.98      18.0 +/-    1.98  0.060 / 0.050
G29     325.8          50.2               15.7 +/-    1.12      19.7 +/-    1.12  0.050 / 0.050