Changes between Version 25 and Version 26 of ImplementAnalysisseik

Timestamp:

May 17, 2011, 3:38:32 PM (13 years ago)

Author:

lnerger

Comment:

--

ImplementAnalysisseik

@@ -182 +182 @@
  * The routine does not require that the product is implemented as a real matrix-matrix product. Rather, the product can be implemented in its most efficient form. For example, if the observation error covariance matrix is diagonal, only the multiplication of the diagonal with matrix `A_p` has to be implemented.
  * The observation vector `obs_p` is provided through the interface for cases where the observation error variance is relative to the actual value of the observations.
- * The interface has a difference for SEIK and ETKF: For ETKF the third argument is the ensemble size (`dim_ens`), while for SEIK it is the rank (`rank`) of the covariance matrix (usually ensemble size minus one). In addition, the second dimension of `A_p` and `C_p` has size `dim_ens` for ETKF, while it is `rank` for the SEIK filter. 
+ * The interface has a difference for SEIK and ETKF: For ETKF the third argument is the ensemble size (`dim_ens`), while for SEIK it is the rank (`rank`) of the covariance matrix (usually ensemble size minus one). In addition, the second dimension of `A_p` and `C_p` has size `dim_ens` for ETKF, while it is `rank` for the SEIK filter.  (Practically, one can usually ignore this difference as the fourth argument of the interface can be named arbitrarily in the routine.)
 
 === `U_init_obsvar` (init_obsvar.F90) ===