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MATISSE (Advanced Modeling of the Earth for Environment and Scenes Simulation) is an infrared background scene generator developed for computing natural background spectral radiance images. The code also provides atmospheric radiatives quantities along lines of sight. Spectral bandwidth ranges from 0.4 to 14 μm. Natural backgrounds include atmosphere, sea, land and high and low altitude clouds. The new version MATISSE-v2.0, released this year, has been designed to treat spatial multi resolution in the generated images in order to be able to reach metric spatial variability in pixels footprints. Moreover, MATISSE-v2.0 includes a new sea surface radiance model (water waves and surface optical properties) which depends on wind speed, wind direction and fetch value. Preliminary validations using radiometric measurements have been conducted concerning sea radiances and give promising results. In order to go further in the validation process of MATISSE-v2.0, comparisons with MODIS satellite images have been led. The results of comparing the simulated MATISSE images radiances with the MODIS observations show that the code is performing well. This paper gives a description of MATISSE-v2.0 new functionalities and focus on first results on comparison between MATISSE/MODIS images radiances.

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Generally available satellite images, e. g. from the MODIS sensor, provide data in spectral bands, which are suitable for remote sensing applications and earth surface observations. However, for some applications different bands as well as specific cloud formations for a certain region may be of interest, thus making the simulation of background data essential. Therefore, the software MATISSE ("Advanced Modeling of the Earth for Environment and Scenes Simulation") proved to be the appropriate tool. MATISSE is an infrared background scene generator developed by ONERA for computing natural background spectral radiance images including atmosphere, sea, land and high and low altitude clouds. In order to validate the model, comparisons with MODIS satellite data have been carried out using images in available spectral bands. The investigations comprised selected surface structures like sea, desert, lowland (dry) and highlands (humid). In general, the results on radiance images show a good correlation between MODIS image and the MATISSE-simulation. This paper focuses on comparing results between simulated MATISSE radiance images and the MODIS observations. Based on this, possible sources of error and the limits of the model are discussed.