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Description of the upgrade

A change was introduced in the analysis so that the departures of the observations are now calculated against a first-guess valid at the time of the observation, obtained by interpolation from first-guess at 3, 6 or 9 hours range. Therefore, asynoptic observations are used more consistently.

Note

Implemented: 12 February 1991  

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titleAll IFS cycles
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pageChanges to the forecasting system