PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-19:42:30
G02     52.3           39.4               14.2 +/-    0.67      20.9 +/-    0.67  0.050 / 0.050
G05     85.9           71.3               17.1 +/-    0.51      17.9 +/-    0.51  0.050 / 0.040
G12     186.8          40.9               18.7 +/-    1.66      26.8 +/-    1.66  0.050 / 0.060
G20     203.5          52.1               20.8 +/-    0.65      25.6 +/-    0.65  0.040 / 0.070
G21     265.0          13.0               15.8 +/-    5.25      41.2 +/-    5.25  0.190 / 0.300
G25     242.9          56.4               17.6 +/-    0.97      20.7 +/-    0.97  0.140 / 0.280
G29     325.3          50.1               14.0 +/-    1.02      17.6 +/-    1.02  0.020 / 0.020