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It is recommended to carry out the following actions: Check the request as it is processed by MARS. MARS will print out the request it is processing. It sometimes changes directives, or inherits directives from previous requests, etc., and the resulting request doesn't represent any field in the archive. Visit the online archive cataloguethe MARS Catalogue, following the directives of the request printed by MARS. After some point in the navigation tree, you could find a dead end. If after all you still don't know why your retrieve failed, please, seek advice from User Support.
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Production of Initialised Analyses finished on 29/01/1996. After that date only Analysis is archived.
Why can't I find operational First Guess any more in the
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MARS Catalogue?
With the introduction of 12 hour 4d-Var on 12th September 2000, the data type First Guess has not been produced any longer on the operational deterministic model. That data is available as type Forecast from previous cycles and time step validating at First Guess time. The correspondence between First Guess and Forecast is as follows:
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