Meteorological Interpolation and Regridding (MIR) is a comprehensive and flexible package used at ECMWF.   It  interpolates data for presentation or other purposes.  It has three aims:

• to accept information in any grid point format (e.g. observations or satellite data).
• to convert model or other data from any grid pattern format to any other grid pattern as desired (using an Any-to-Any algorithm).
• to present model or other data graphically on any grid pattern, including 3D presentations and including rotation and cropping as desired.   

The procedure uses an unstructured grid system allowing great flexibility and has proved economical with computer processing time.

The interpolation package MIR does not use a land-sea mask when interpolating data to another resolution.  Processing at the appropriate resolution of IFS data will already have taken the land-sea mask into account.  However, interpretation of the IFS land-sea mask by MIR shows a few points change from land to sea or sea to land.  This only very slightly modifies the display of geographical features.

Users should keep updated about the products through the ECMWF Newsletters and web site.

Further information available on interpretation of MARS data using MIR.

(FUG Associated with Cy49r1)