Abstract
We consider the problem of discrete time filtering (intermittent data assimilation) for differential equation models and discuss methods for its numerical approximation. The focus is on methods based on ensemble/particle techniques and on the ensemble Kalman filter technique in particular. We summarize as well as extend recent work on continuous ensemble Kalman filter formulations, which provide a concise dynamical systems formulation of the combined dynamics-assimilation problem. Possible extensions to fully nonlinear ensemble/particle based filters are also outlined using the framework of optimal transportation theory.
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Communicated by Uri Ascher.
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Reich, S. A dynamical systems framework for intermittent data assimilation. Bit Numer Math 51, 235–249 (2011). https://doi.org/10.1007/s10543-010-0302-4
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DOI: https://doi.org/10.1007/s10543-010-0302-4