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Evaluating the Need for GERB on MTG: Long-term Data and Future Applications

The GERB (Geostationary Earth Radiation Budget) instrument is being discussed in the context of its role on the MTG (Meteosat Third Generation) satellites. With 15 years of data approved, this user consultation highlights the necessity of long-term datasets for climate and chemistry research. A recent expert meeting questioned the need for a broadband instrument in geostationary orbit, suggesting existing GERB instruments could suffice for spectral imager applications. This prompts inquiries about the requirement of extensive GERB data for various studies and the viability of narrowband alternatives.

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Evaluating the Need for GERB on MTG: Long-term Data and Future Applications

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Presentation Transcript

  1. Do we need GERB on MTG ?

  2. Context • GERB on 4 MSG’s approved, will provide 15 year dataset. • First user consultation meeting on MTG focused on NWP, missing requirements: climate and chemistry. • Climate expert meeting, 16/10/2002 : “… no need for a broad-band instrument in geo orbit in the long term. It would be enough to make use of the series of already planned GERB instruments in order to learn how to use spectral imagers for the purpose.”

  3. Questions for the GIST • Which studies/applications require more then 15 years of GERB data ? • Are long term GERB measurements usefull if they are not global ? • Can GERB be replaced by narrowband regressions calibrated by e.g. CERES ?

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