ERA-40 Global Upper Air Satellite Wind Observation Feedback Record Reports

SATWNDs, from multiple data sources, were assimilated into an ECMWF model and produced ERA-40. Select variables include zonal and meridional wind speed components at the observed pressure level.

The metadata generated during the ERA-40 quality control data assimilation process were appended to the input observations. The final combination of input observations and feedback metadata are called feedback record reports.