[Cosmic_announce] New Inversion Software Bufr Test Files - Feedback Needed

[Harald Anlauf]

Dear all,

I had a first look at about 8 days worth of the test data and compared
with the COSMIC NRT data we receive via GTS.  Initial impressions are:

- roughly 5% more processed profiles, but slightly less net data in
  lower troposphere (June 1-8).

- bias is changed (mostly improved), notably above 40 km, but also
  in the lower troposphere;

- the rms difference to model background (non-operational NWP model)
  is significantly reduced above 35 km, but also around and slightly
  above tropopause levels; (see attached figure);

- the data contain a new estimate of the observation error given the
  actual circumstances, which is much higher than the previous one,
  and which appears to be very conservative (i.e. too pessimistic).
  This may be an issue for us (DWD).

Is this what we should expect from the new processing?
Is there more documentation, especially on the "similar error
characteristics"?

Thanks,
Harald


On Friday, 21. November 2014 00:03:03 Maggie Sleziak wrote:
> Dear Weather Center Users:
> 
> 
> BUFR test files from our new inversion software for May, June and July 2014
> are available for testing by weather centers on the CDAAC web site:
> 
>  ftp://cdaac-www.cosmic.ucar.edu/newroam_BUFR/
> 
>  These new files have similar error characteristics compared to existing
> bfrPrf files, so we do not anticipate any problems when they are
> assimilated by the weather centers.  We plan on upgrading our real time
> data processing suite to use this new software soon, but we want to give
> weather centers the opportunity to test these data first. We would
> appreciate feedback from the Weather Centers as soon as possible.
> 
> Cheers,
> The CDAAC Team.

-- 
Dr. Harald Anlauf
Deutscher Wetterdienst (DWD)           | Phone:  +49 69 8062 4941
FE12 / Datenassimilation               | Fax:    +49 69 8062 3721
Frankfurter Str. 135                   | e-Mail: harald.anlauf at dwd.de
63067 Offenbach                        | Web:    http://www.dwd.de
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