Introduction to data assimilation in meteorology - ForOT Optical ...

Conclusion on data assimilation
Data assimilation provide an accurate image of the true state of
the atmosphere at a given time in order to initialize numerical
weather forecast using :
– Observations
– A previous forecast of the state of the atmosphere
Observations used are various and numerous and provide large and
small scale information.
The use of a meso-scale data assimilation system improve Limited
Area Model forecast accuracy up to 18 hours.
This system has been tested for one year and will be put into
operation next month