In March 2002, the European Space
Agency (ESA) launched Envisat, an
advanced polar-orbiting Earth observation satellite which provides
measurements of the atmosphere, ocean, land, and ice. In particular it
carries some atmosphere sounding instruments that measure temperature,
ozone, water vapour and other chemical species from the troposphere to
is a project to
exploit and develop earth observation data from Envisat using data
assimilation. This activity is fundamental for the development and
testing of the models and observations needed to:
climate change and ozone depletion;
forecast the future evolution of the atmosphere.
an objective and quantitative way of confronting, testing and improving
models and observations.
Envisat data into three leading Numerical Weather Prediction systems
(each set up with different configurations) and into four leading
photochemical modelling groups (each modelling group focusing on a key
species, or a key region of the atmosphere). Comparison between all
assimilated results will give confidence in common conclusions.
deliverables from ASSET
(algorithms, quality-controlled datasets, data dissemination
infrastructure) will contribute toward improving efforts to understand,
simulate, predict and monitor the environment.
to ASSET's Official Web