Alena Trojakova replied on the 24th of October about ALADIN experience
Ensemble based technique is mostly used to generate background error
statistics and all the resolved scales are influenced by analysis.
Regarding tuning only REDNMC is considered with Desroziers et al (2005)
method used for its estimation and the most recently we focus on
grid-point sigma_b maps. The idea of a scale-selective background errors
is quite interesting, but to be honest I have no idea how to do it.
Regarding technique to account for host model information the Digital
Filter (DF) blending technique (Brozkova et al 2001) is used currently
in Czech Republic and Slovakia, tuning is detailed in the documentation
by Dominique Giard
www.cnrm.meteo.fr/gmapdoc//spip.php?article97&lang=en. I found
your studies on spectra presented on HIRLAM Forum quite interesting and
I'll try to contribute with our results with DF blending.
In longer term I would like to revitalize work on Jk within ALADIN and
any experience is welcome.