A lower bound for prediction uncertainty in nowcasting/forecasting models

Autor: Francois Vandenberghe, J. Clayton Kerce
Rok vydání: 2007
Předmět:
Zdroj: Assimilation of Remote Sensing and In Situ Data in Modern Numerical Weather and Environmental Prediction Models.
ISSN: 0277-786X
DOI: 10.1117/12.740665
Popis: We introduce a formalism for computing the Cramer-Rao lower bound (CRLB) for a general dynamical system, develop an approach to bounding the process noise for a general dynamical system, and discuss the application of this formalism in the context of a prototypical forecasting model. This model consists of a simple transport diffusion process with assimilation updates based on point source measurements. We investigate the use of Krylov subspace techniques for efficient computation of two point correlation functions, and the use of this technique in generating a coarse-grained state covariance.
Databáze: OpenAIRE