id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
251	Rejection of entire profiles containing low background pressures/temps in FM	cburrows	cburrows	"Currently the operational Met Office model runs with 70 vertical levels and this raised model top gives rise to pressure and temperature values which are below the lower limits set by ROPP.  When running ropp_fm_bg2ro_1d, ropp2ropp sets these values to the missing data indicator, and [https://trac.grassaf.org/ropp/browser/ropp_src/trunk/ropp_fm/common/ropp_fm_roprof2state.f90 ropp_fm_roprof2state.f90] then rejects the entire profile, because it contains a the missing data value which is negative (line 165 and onward).

Example output:
-----------------------------------------------------------------------
 ROPP Forward Model - v5.0
-----------------------------------------------------------------------


INFO:  Processing profile    1 of      1
INFO:  (OC_20110729180000_META_U999_METO)


WARNING (from ropp_fm_roprof2state):  One or more pressure values are negative.

INFO (from ropp_fm_roprof2state):  (Minimum pressure value = -0.1E+09)

INFO (from ropp_fm_roprof2state):  Check input data and valid_range attributes

INFO (from ropp_fm_roprof2state):  Set status flag state%ok to FALSE

The first action should be to change the ranges for background temperature and pressure.  Changing the minimum allowed pressure value to 0.001hPa instead of 0.01hPa, and the minimum temperature value to 80K instead of 150K would result in the acceptance of all the profiles currently being tested (UCAR profiles from 29/7/11).  Whatever the range is modified to, this must clearly be announced to users, as data which is currently being rejected, may now be accepted.

Also, perhaps, the test for negative values needs a secondary condition that the negative value is not equal to the missing data indicator to avoid rejection of entire profiles because of one missing value.

Note that until this is addressed, no recent Met Office backgrounds will be accepted by the ROPP forward model."	defect	closed	normal	6.0	ropp_fm	5.0	fixed