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ERA-40 Global Upper Air Radiosonde Observation Feedback Record
Reports include 6 hourly upper air radiosonde observation (RAOB)
feedback record reports from RAOBs used in the ECMWF 45-year
reanalysis (ERA-40) covering the period from September 1957 to
August 2002. RAOBs, from multiple data sources, were assimilated
into an ECMWF model and produced ERA-40. Select variables found in
the reports include temperature, pressure, height, relative
humidity, specific humidity, zonal wind, and meridional wind speed
components. Data may be available at mandatory or significant levels
from 1000 millibars to 1 millibars. 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.
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