Hyper fast radiative transfer for the physical retrieval of surface parameters from SEVIRI observations

[摘要] This paper describes the theoretical aspects of a fast scheme for the physical retrieval of surface temperature and emissivity from SEVIRI data, their implementation and some sample results obtained. The scheme is based on a Kalman Filter approach, which effectively exploits the temporal continuity in the observations of the geostationary Meteosat Second Generation (MSG) platform, on which SEVIRI (Spinning Enhanced Visible and InfraRed Imager) operates. Such scheme embodies in its core a physical retrieval algorithm, which employs an hyper fast radiative transfer code highly customized for this retrieval task. Radiative transfer and its customizations are described in detail. Fastness, accuracy and stability of the code are fully documented for a variety of surface features, showing a peculiar application to the massive Greek forest fires in August 2007.

[发布机构] School of Engineering, Universitádegli Studi della Basilicata, Via Ateneo Lucano 10, Potenza; 85100, Italy^1;CNISM, Unitádi Ricerca, Universitádella Basilicata, Potenza; 85100, Italy^2

[效力级别] 数学

[关键词] Meteosat second generations;Physical retrievals;Radiative transfer codes;Spinning Enhanced Visible and Infrared Imager;Surface parameter;Surface temperatures;Temporal continuity;Theoretical aspects