id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
355	Observations below the model surface in refractivity forward operator	sti	cburrows	"In 

ropp_fm_refrac_1d

we forward model refractivity observations below the model surface by extrapolation. 

I think it would be safer to set to missing. We should consider this
simplification.

 "	defect	closed	normal	8.0	ropp_fm	7.0	fixed