pyPDAF.PDAF.estkf_OmegaA

pyPDAF.PDAF.estkf_OmegaA()

This function is an internal function in PDAF. This function performs the second term of Eq. (29) 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[rank, dim_col], np.float64]) –

Input matrix

The1st-th dimension rank is Rank of initial covariance matrix; the2nd-th dimension dim_col is Number of columns in A and B.

Returns:

B – Output matrix (TA)

The 1st-th dimension dim_col is Number of columns in A and B

Return type:

ndarray[tuple[rank+1, dim_col], np.float64]