pyPDAF.PDAF.etkf_Tleft

pyPDAF.PDAF.etkf_Tleft()

This is an internal function in PDAF where it perform matrix calculation of B = TA. This function performs the second term of Eq. (34) i Nerger, L., Janjić, T., Schröter, J., Hiller, W. (2012). A unification of ensemble square root Kalman filters. Monthly Weather Review, 140, 2335-2345. doi:10.1175/MWR-D-11-00102.1

Parameters:

A (ndarray[tuple[dim_ens, dim], np.float64]) –

Input/output matrix

The 1st-th dimension dim_ens is Rank of initial covariance matrix The 2nd-th dimension dim is Number of columns in A and B

Returns:

A – Input/output matrix

The 1st-th dimension dim_ens is Rank of initial covariance matrix The 2nd-th dimension dim is Number of columns in A and B

Return type:

ndarray[tuple[dim_ens, dim], np.float64]