subspace_update

Stochastic iterative ensemble smoother (IES, i.e. EnRML) with subspace implementation.

subspace_update

Ensemble subspace update, as described in Raanes, P. N., Stordal, A. S., & Evensen, G. (2019). Revising the stochastic iterative ensemble smoother. Nonlinear Processes in Geophysics, 26(3), 325–338. https://doi.org/10.5194/npg-26-325-2019 More information about the method is found in Evensen, G., Raanes, P. N., Stordal, A. S., & Hove, J. (2019). Efficient Implementation of an Iterative Ensemble Smoother for Data Assimilation and Reservoir History Matching. Frontiers in Applied Mathematics and Statistics, 5(October), 114. https://doi.org/10.3389/fams.2019.00047