System Science: Application to Space Weather Analysis, Modelling, and Forecasting
Open Access
Research Article

Fig. 1

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Cartoon of how the LETKF works. For each grid point (green dots, selected point is blue) a localisation region is drawn (blue circle) and only those observations (red triangles) which are in the localised region are included in the analysis. Cartoon based on that by Kalnay (2005).