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This website is designed to compare IASI observations collected through direct broadcast at Météo France with those obtained via EUMETSAT global reception. Direct broadcast, also known as local reception, is possible when the satellite is within the line of sight of the receiving station. For Météo France, this station is located in Lannion, Côtes d'Armor. These locally received observations play a valuable role in limited-area numerical weather prediction models. However, because the reception and processing methods for local and global data differ, ensuring the quality of these observations is critically important. To address this, we provide a range of maps and graphics to evaluate differences between local and global reception. Additionally, the website includes visualizations of processed data, such as cloud fraction and cloud classification. This platform was developed as part of the NWPSAF project.
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The Infrared Atmospheric Sounding Interferometer (IASI) is a key instrument for Numerical Weather Prediction (NWP), providing highly accurate data on the vertical structure of atmospheric temperature and humidity. With an accuracy of 1 K and a vertical resolution of 1 km, IASI delivers the detailed observations necessary to significantly enhance weather forecasting models. Carried aboard the Metop satellites, IASI plays a pivotal role in advancing NWP. Remarkably, data from Metop satellites account for 40% of the impact of all space-based observations used in NWP forecasts, highlighting its importance in improving the precision of weather predictions.
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The Satellite Application Facility for Numerical Weather Prediction (NWP SAF) aims to improve and support the interface between satellite data/products and European activities in NWP. The NWP SAF is one of several EUMETSAT SAFs (Satellite Application Facilities). Utilising specialist expertise from the Member States, SAFs are dedicated centres of excellence for processing satellite data and form an integral part of the distributed EUMETSAT Application Ground Segment. Further information about SAFs is available on the EUMETSAT web site. The SAF for NWP interacts, where appropriate, with related work in other SAFs and in other EUMETSAT activities in order to enhance collaboration and to minimise duplication of effort.
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EUMETSAT is a global operational satellite agency based in Darmstadt, Germany. Its primary mission is to collect precise and reliable satellite data on weather, climate, and the environment globally. The agency then delivers this data to its member states, international partners, and users around the world.
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CEMS is a research center within CNRM/CNRS, based in Lannion, France. It specializes in studying the macro- and micro-physical properties of clouds, ocean surface variables, and radiative transfer modeling, with a primary focus on leveraging meteorological satellite data for weather monitoring and forecasting. The center collaborates extensively with French and international research laboratories, as well as other CNRM researchers, in areas such as satellite data assimilation, radiative transfer modeling, surface property analysis, and cloud physics. A key aspect of CEMS's mission is to transition its research findings to Météo-France’s operational services. CEMS is actively preparing for upcoming space missions and addressing emerging challenges in weather forecasting. These include assimilating data from next-generation high-resolution instruments, incorporating aerosol data, and refining methods for estimating uncertainties.
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