[Cosmic_announce] Edition 4 BUFR files expected soon!

[Doug Hunt]

Hi Harald:  I did notice a few small differences in the data values. 
These are due to the fact that I am using a different BUFR library that 
uses double precision rather than single precision.  So, if anything the 
new values ought to be more accurate.

As to the 175 'originating center' value, we have contacted NOAA to apply 
to the WMO about getting 175 reserved for 'UCAR' rather than using 60 
('NCAR').

Regards,

   Doug

dhunt at ucar.edu
Software Engineer
UCAR - COSMIC, Tel. (303) 497-2611

On Wed, 21 Nov 2012, Harald Anlauf wrote:

> Hi Doug!
>
> On Tuesday, 20. November 2012 21:06:28 Doug Hunt wrote:
>> Greetings:
>>
>> The current version of BUFR files available from CDAAC and the
>> GTS is edition 3.  By the end of November, the WMO wants all edition 3
>> files to be phased out in favor of the more recent edition 4 BUFR files.
>>
>> The change is only a small difference in the header--all the values
>> remain the same.  Attached are sample edition 4 BUFR files from the COSMIC
>> and C/NOFS missions.
>
> the attached data actually do show small differences to the data
> disseminated via GTS (usually a few meters in impact parameter, and
> also small differences in the bending angles), but the obs-model check
> shows that the effective differences are much smaller than the
> observation errors we apply operationally.
>
> While running these data through our assimilation system, I noticed
> that the field "originating center" is set to 175 (i.e. reserved for
> other centers).  Is there a reason that you do not use the value 60
> there, or is it an oversight?
>
>> Next week we plan to start delivering these files.  Note that the version
>> will change from the current '0001.0006' to '0001.0007'.
>>
>> Please let me (dhunt at ucar.edu) know if you see a problem with these
>> files or need extra time!
>
> Cheers,
> Harald
>
> -- 
> 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
>