assimilateLite: Ensemble Assimilation Lite version
In garciapintado/rDAF: An R Data Assimilation Framework

Description Usage Arguments Details Value Author(s)

Main assimilation function called by analyseUG

1 2	assimilateLite(prm, A, HA, dy, R, debugmode, Kfname, xpos = NULL, xllen = NULL, ypos = NULL, mpi = NULL, sglst = NULL)

`prm`	LIST, assimilation parameters
`A`	REAL, [n,m], 'dgCMatrix' or 'dgeMatrix', perturbation matrix, where `n`: augmented state vector length, and `m`: ensemble members
`HA`	REAL, [p,m], perturbations mapped into the dual of the observation space, where `p` is the number of observations
`dy`	REAL, [p], innovation vector
`R`	REAL, [p,p], 'ddiMatrix', 'dsyMatrix', or 'dtCMatrix': observation error covariance
`debugmode`	LOGICAL, whether to activate verbose output
`Kfname`	CHARACTER, filename, including path, of the output file to write the Kalman gain to
`xpos`	REAL, [n,2], augmented state geographical positions [0,0] for global variables
`xllen`	REAL, [n], localisation length
`ypos`	REAL, [p,2], observation coordinates
`mpi`	LOGICAL
`sglst`	LIST. If not NULL, SpatialGraph-based distance is used for localisation

This function would most commonly be called by analyseUG. The arguments xpos, xllen, ypos, mpi, and sglst are only proided for input compatibility with assimilate(), which is under development. These are oriented to conduct observation localization, and are unused and set to NULL within this function.

A LIST with the components