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The next SAMEX experiment to be conducted in spring of 1999 is providing some momentum for the CRAFT project to move on a fast track to provide access and distribution of Level II data from several radars (~ to 9) in the area of Oklahoma, Texas, Arizona, NM, and Kansas.
Kelvin Droegemeier provided a planning schedule . Keith Brewster provided a brief summary of the September meeting. Following are excerpts from trip reports produced by Droegemeier, Brewster and Russ Rew, and information gleaned at the Oklahoma meeting.
In all experiments, the ARPS was initialized using the RUC analysis to provide the background fields, to which were assimilated Oklahoma Mesonet, wind profiler, and SAO surface observations. A run using this configuration was compared to an experiment in which NIDS reflectivity data were also added (including various assumptions about the motion and other water substance fields), and to an experiment in which the same storm was initialized using full WSR-88D level II data and the Shapiro single-Doppler velocity retrieval scheme (which provides high-resolution cross-beam and vertical winds, along with temperature and pressure fields). All forecasts were run for 2 hours and 20 minutes:
Proving the practicality of archival, retrieval,
and generation of gridded assimilated data sets
from level II data would move the U.S. forward
in small-scale numerical weather prediction
(NWP). Droegemeier hopes to create a prototype
system that NOAA could adopt. He hopes the
success of the prototype will be a springboard
for proposals to take advantage of the wideband
data, such as:
CAPS (Center for Analysis and Prediction of
Storms)
currently
ingests level II data from KTLX, can provide fully 3-D gridded
datasets.
Also,
Coordinator of Project SAMEX.
OSF (NWS WSR-88D Operational Support
Facility)
coordinates and manages
RIDDS connection requests
NSSL (National Severe Storms Laboratory)
installs and maintains
RIDDS, develops
software and runs RIDDS sites for WDSS
CCG (Center for Computational
Geosciences)
developed
DoRaDa software that puts level II data on CD-ROM for PC-based
analysis
program
Oklahoma State Regents for Higher
education
operates
a sophisticated Oklahoma-wide network infrastructure (OneNet); wants to
see
it pushed
to capacity; has agreed to fund all networking costs, computer ingest
hardware;
coordinates
link to vBNS and Abilene
UCAR/Unidata
developers
of LDM software, IDD system; has a complete data distribution
infrastructure
already
in place; can adapt to the level II data from multiple radars
University of Washington
Harry Edmon wrote
software to conduct level II access experiment at the Univ of
Washington
based on their Unidata LDM/IDD system
NOAA Forecast Systems Labs
also
working
on level II data acquisition
The University of Washington is sending KATX (Seattle) data to OU, and OU is sending KTLX data to WA as a test of the data distribution. Testing on the KTLX continues and should lead to additional radars being implemented in preparation of the SAMEX 1999 experiment.
The group will continue to monitor the plans for 1999 and beyond, after the current NIDS contract expires. There is an AMENDMENT to the Agreement for Direct Real-Time Access to WSR-88D Wideband Data (Base Data) by Universities that was prepared by NOAA for users of the Level II (Wideband Data).
To facilitate communication, Unidata has created an email list
<craft@unidata.ucar.edu>.
Contact <support@unidata.ucar.edu> if interested in participating.
Questions or comments can be sent to lmiller@unidata.ucar.edu
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