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 Model simulated satellite data produced at ECMWF provide unique information about the output from the numerical weather prediction model. Forecasters can use images generated from the simulated satellite data to visualise model forecast cloud and moisture features, while model developers can use the data in their research activities, in particular to validate model developments which affect the temperature and moisture fields.

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• Nadir view for every model grid point
  The new simulated satellite data assume a nadir view (top-down) for every model grid point so the effect of looking slantwise through the atmosphere is neglected.
• Produced in post-processing within the IFS, with no mapping on satellite grid
  This is a technical advantage of the new simulated satellite data being now produced in the post-processing within the IFS and being part of the research tests for operational release to validate model developments which affect the temperature and moisture fields.
• Availability of the simulated satellite data in MARS
  The new simulated satellite data products are archived in MARS in GRIB edition 2 and are available at every post-processing step, out to 240 hours: 3 hourly from T+0 to T+144 and 6 hourly from T+150 to T+240.
• Availability of the simulated satellite data in ECMWF Catalogue and dissemination in the future
  The timeliness of delivery is optimal for dissemination. The addition of the new simulated satellite data products to the ECMWF Catalogue will be proposed. It will not be available to commercial customers / researchers until then.

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