id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
207	Incorrect 1DVAR BA errors?	Dave Offiler	Michael Rennie	"Message via Helpdesk & Kent:

{{{
> -----Original Message-----
> From: helpdesk@grassaf.org [mailto:helpdesk@grassaf.org]
> Sent: Wednesday, March 03, 2010 2:42 PM
> To: undisclosed-recipients:
> Subject: GRAS SAF Helpdesk Request w.r.t. ROPP Software
> 
> The GRAS SAF Helpdesk has received a question from Pietro Sofi
> 
> The helpdesk subject is:
> 
> ending angle standard error deviations
> 
> The helpdesk description is:
> 
> Dear ROPP team, I would be very grateful for your help on the 
> following problem.
> 
> Wen I give to ropp_1dvar_bangle a COSMIC atmProfile (from
> CDAAC) processed with ucar2ropp colocated with a ECMWF in the 
> ropp-test data (VSDC for obs errors) I get:
> 
> ERROR (from ropp_1dvar_covar_bangle):  Bending angle standard error 
> deviations requested on a per profile basis, but observation data file 
> did not contain sigmas.
> 
> Truly observation sigmas (~10-4) are present and in range ([0 0.01]).
> 
> I substituted, in my oc_20090430211921_c002_g008_ucar.nc
> file, bendings and sigmas from a colocated ropp-test observation file 
> and ropp_1dvar_bangle successfully finished.
> 
> I substituted sigmas only (~10-3) and I got:
> 
> ERROR (from ropp_1dvar_solve):  Initial cost function too high. 
> 
> (Note that i had to fill first the L1 fields in ucar2ropp output, as 
> they were set to missing values, only generic bendings and sigmas were 
> filled).
> 
> What could be wrong?
> 
> Best regards,
> Pietro Sofi
> 
}}}
"	defect	new	normal	4.1	ropp_1dvar	4.0		1dvar, errors, BA	huw.lewis@… kbl@…