PREPARING THE ASSIMILATION OF IASI -NEW GENERATION IN NWP MODELS: TOWARDS A CHANNEL SELECTION

Francesca Vittorioso (1) , Vincent Guidard (1) , Nadia Fourrié (1) , Javier Andrey-Andrés (1)

1 CNRM - Centre national de recherches météorologiques

As the EUMETSAT Polar System-Second Generation (EPS-SG) is being prepared, a new generation of the IASI instrument has been designed. The IASI New Generation (IASI-NG) will measure at spectral resolution and a signal-to-noise ratio improved by a factor 2 compared to its predecessor. Measurement precision will be improved as well. The high amount of data resulting from IASI-NG will present many challenges in the areas of data transmission, storage and assimilation and the number of individual pieces of information will be not exploitable in an operational Numerical Weather Predictions (NWP) context. For these reasons, an appropriate IASI-NG channel selection is going to be performed aiming to select the most informative channels for NWP. In this paper the propaedeutic study towards a channel selection is displayed. More in details, the construction of a simulated observation database, to be used as a basis for selection, and the use of a diagnostic method to build a full covariance matrix of the observation errors (R matrix), will be here described.

Mots clés: IASI-NG; Numerical Weather Prediction; channel selection

Domaines: Océan, Atmosphère; Météorologie

Francesca Vittorioso, Vincent Guidard, Nadia Fourrié, Javier Andrey-Andrés. PREPARING THE ASSIMILATION OF IASI -NEW GENERATION IN NWP MODELS: TOWARDS A CHANNEL SELECTION. EUMETSAT Meteorological Satellite Conference, Oct 2017, Rome, Italy. ⟨meteo-01799302⟩