id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
247	Covariance matrix check	Ian Culverwell	Ian Culverwell	"At present there is no check that an ingested covariance matrix has the right size for the problem in hand. Because of the way covariance matrices are stored in ROPP (in a ""triangular"" format), a matrix appropriate to a bigger problem can be read in OK, without crashing and with 1s in the right place (think about it).  So it would be subtly wrong - the worst kind of error. 

At least one user has fallen over with this.  So we should put a check in to stop it happening. 
"	defect	assigned	normal	5.1	ropp_1dvar	4.1		Covariance matrix