20021122: NCEP changes-jifmemo: jif_memo_021122 (fwd)

• To: nws-changes@xxxxxxxxxxxxxxxx
• Subject: 20021122: NCEP changes-jifmemo: jif_memo_021122 (fwd)
• From: John Ward <wd22jw@xxxxxxxxxxxxx>
• Date: Friday, November 22, 2002 1:44 PM -0500

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SUBJECT:          Changes to the NWS Production Suite



    There will be no memo issued the week of 25 November.

    At 1550 UTC on 21 November 2002, the NESDIS switched from a
primary NOAA-16 AMSU-A1 instrument to a redundant instrument.
This redundant instrument produced undesired changes in the
calibrated brightness temperatures which were ingested into the
NCEP atmospheric models.  At 1400 UTC on 22 November 2002, items
875 and 876 were implemented to prevent these data from being
ingested into the Eta and GFS analyses.  Data from this
instrument will again be ingested into the NCEP models after they
are corrected.

    On 7 January 2003, the NESDIS GMS-5 water vapor and the IR
winds will no longer be ingested into /dcom on the IBM SP.  These
data are no longer being assimilated by the models.  When this
change occurs the following files in /dcom on the IBM SP will no
longer be populated with GMS-5 data:

              /dcom/us007003/YYYYMMDD/b005/xx050
              /dcom/us007003/YYYYMMDD/b005/xx051

    There is currently a moratorium on changes to the Production
Suite as parallel operations are being established on the next
Central Computer System (CCS).  No implementations will be
scheduled during the moratorium, with the exception of changes
required to correct operational problems.  The moratorium is
expected to extend through the normal holiday moratorium period,
at the minimum.

    All major forecast model codes have been ported to the CCS.
A log of problems encountered during the code conversion can be
found in /com/logs/ccscodelog on the IBM SP.  System acceptance
testing continues and is expected to end on 1 December.  A
majority of the forecast model systems are now running in
real-time parallel on the CCS and will continue to be executed
daily during acceptance period.  Data flow and ingest have not
been established on the CCS, so data dumps from the IBM SP will
be transferred to the CCS to support the real-time parallel runs.
Data ingest is not expected to be established on the CCS until
after the first of the year.  More details on the CCS transition
and moratorium will be provided as they become available.

   General users can expect access to the CCS by mid December.
Information on the migration of user data from the IBM SP to the
CCS will be provided as soon as the schedule for the migration is
established.  During December and January user access to the CCS
may be interrupted for testing and minor system configuration
changes.  Whenever possible, prior notice of system downtime or
unavailability will be provided.

    A preliminary list for 2003 can be found at:

        http://www.nco.ncep.noaa.gov/pmb/changes

    As additional information about each implementation becomes
available, links will be added on the change summary page.

    To unsubscribe from the JIF memo use the link provided at:

        http://www.nco.ncep.noaa.gov/pmb/jifmemo/

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