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Filtering and interpolationThe GRIB Filter icon provides the means to select a subset of fields from a GRIB file. It (and the MARS Retrieval icon) also contains some parameters, such as Grid, which allow for interpolation to a new grid. Data processingThere are quite a few icons available in Metview to process GRIB data. These include the icons mentioned above and the following other icons: Metview's script interface provides access to all these icons and also offers a rich set of functions and operators to work with GRIB data (see Script Language Support below). Retrieval from MARSIf Metview has access to ECMWF's MARS archive, GRIB data can be retrieved via the Mars Retrieval icon. At ECMWF MARS access is set up on all computer systems, while outside ECMWF the MARS Web API could be used in Metview (see the setup instructions here). Script language supportMetview provides full support for GRIB from its Macro and Python interfaces. In script GRIB data is represented as a fieldset, which can be imagined as a list of GRIB messages. Fieldset handling probably Metview's richest and most powerful interface. The full list of available functions and operators on fieldsets can be found on the Fieldset Functions and Thermodynamic functions pages. |