Users of the IDD CONDUIT datastream:
This email is being sent on behalf of the Unidata Users's Committee.
Compilation of responses to the Unidata User's Committee spring 2008 survey on
CONDUIT datastream deletions/additions showed consensus for the following
changes
to the datastream:
Removals:
- 40 km NAM CONUS (NCEP offering to provide 12 km, 60 levels, 84 hours at
0,6,12,18Z)
- 2.5 degree MRF out to 168 hours
Additions:
- RTMA -- Real Time Mesoscale Analysis
- SREF -- Short Range Ensemble Forecast
Based on the survey results, we will be working with NCEP to make the following
changes
to CONDUIT _before_ the annual holiday moratorium on changes to the CCS Production Suite
(currently scheduled for Wednesday, 17 December 2008, but changes must be requested
before Monday, 20 November):
1) remove the 40 km NAM and 2.5 degree MRF products from CONDUIT
2) add SREF data to CONDUIT
3) add the parallel run (non-operational) RTMA grids to CONDUIT (since the
operational
RTMA products are already available in the IDD; see below)
Please let us know as soon as possible if any of these changes will
significantly impact
your use of data delivered in CONDUIT.
Comments on the availability of operational RTMA grids:
- a review of NWS TECHNICAL IMPLEMENTATION NOTICE announcements broadcast in
NOAAPort:
http://www.weather.gov/om/notification/tin06-24rtma_grids.txt
http://www.weather.gov/os/notification/tin06-24aaa_rtma.txt
http://xwww.isos.noaa.gov/om/notification/tin08-56_rtma.txt
http://www.nws.noaa.gov/os/notification/tin07-90rtma_alaska.txt
etc.
and sent to subscribers of the nws-changes@xxxxxxxxxxxxxxxx email list:
http://www.unidata.ucar.edu/mailing_lists/archives/nws-changes/2006-July/004324.html
reminded us that a number of operational RTMA grids have been included in the
NOAAPort
satellite broadcast and in the IDD NGRID datastream since the end of summer,
2006.
The RTMA fields currently included in NGRID are:
2 m Temperature and Temperature error
2 m Dewpoint temperature and dewpoint temperature error
10 m U wind component
10 m V wind component
10 m wind Direction and Direction error
10 m wind Speed and Speed Error
Precipitation /no error grid/
GOES effective cloud amount /no error grid/
A full listing of what is available can be generated using the 'notifyme'
invocations
listed below.
- a LDM 'pqact' pattern-action entry for some of the RTMA grids that are
available in
the IDD NGRID datastream is contained in the Unidata GEMPAK v5.11.1 (and
several previous)
release.
Please review the information in the 'Site Configuration for Products' portion
of
the Unidata GEMPAK website for instructions on how to create LDM pattern-action
file(s) and 'ldmd.conf' entries:
Unidata HomePage
http://www.unidata.ucar.edu
Unidata GEMPAK HomePage
http://www.unidata.ucar.edu/software/gempak
Site Configuration for Products
http://www.unidata.ucar.edu/software/gempak/GEMPAK/configuration.html
The Unidata GEMPAK 5.11.4 release (which is being prepared now) will contain
updated pattern(s) to process the RTMA grids in the IDD NGRID datastream.
- NOTE: for sites not using GEMPAK or the GEMPAK LDM pattern action files:
- request the RTMA grids via an ldmd.conf entry for the NGRID datastream:
request NGRID "RTMA" upstream_feed_host <- replace
'upstream_feed_host' with the
name of an LDM server
that provides NGRID
- use the LDM 'notifyme' utility to verify that your upstream and your own
LDMs are
receiving the RTMA products from NGRID (in both cases 'notifyme' is run as
user 'ldm'):
Upstream:
notifyme -vxl- -f NGRID -o 10000 -p RTMA -h upstream_feed_host
Your own LDM:
notifyme -vxl- -f NGRID -o 10000 -p RTMA
- example 'pqact' pattern-action file entries that will FILE the non-cloud
amount
and precipitation RTMA products into different directories based on their
grid
(e.g., grid 175, 201, 213, 227):
# RTMA (real-time mesoscale analysis) grids
NGRID RTMA/#(.*)/(............)F.../(.*)/(.*) m HGHT
FILE data/rtma/\1/\2_\3.\4m
Example 'pqact' pattern-action file entries that will FILE the RTMA GOES
effective cloud amount and precipitation products:
# RTMA (real-time mesoscale analysis) cloud amount and precipitation grids
NGRID RTMA/#(.*)/(............)F.../(.*)
FILE data/rtma/\1/\2_\3
Please remember that some whitespace in 'pqact' patterns are tabs, not
spaces:
whitespace between NGRID and RTMA is a tab
whitespace before FILE is a tab
whitespace after FILE is a tab
Cheers,
Tom
--
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