Re: 20030313: Nexrad images ETL/NOAA

Dave, 

If nothing else we can meet and discuss when you are here for our
conference. I will discuss with Steve Chiswell for plotting ideas via
GEMPAK and maintain this thread..

Thanks for the info, will get back to you...

-Jeff
____________________________                  _____________________
Jeff Weber                                    address@hidden
Unidata Support                               PH:303-497-8676 
COMET Case Study Library                      FX:303-497-8690
University Corp for Atmospheric Research      3300 Mitchell Ln
http://www.unidata.ucar.edu/staff/jweber      Boulder,Co 80307-3000
________________________________________      ______________________

On Thu, 13 Mar 2003, David Welsh wrote:

> Jeff Weber wrote:
> > 
> > David,
> > 
> > We are speaking of level III data right?
> > 
> > We can feed you the radar data from here if it makes things easier, not
> > sure what FSL is doing with their radar data.
> > 
> > Phone is OK, but we prefer to maintain e-mail records of things of this
> > nature, so we do not need to remember all the details when it crops up
> > again, we can just search our archives..:)
> > 
> > Is the line plot data comma or tab delimited ASCII, how many fields, and
> > what are the feilds..maybe you can send me a "example" data set so I can
> > see if and how much work is needed to make them viewable via GEMPAK..
> > 
> > Steve Chiswell maintains the GEMPAK code for us here and we may want to
> > bring him into this discussion at some point.
> > 
> > I believe you just wanted the base refl tilt from FTG, PUB, CYS, and GLD..
> > 
> > Here is another option...we create a nat'l 1 Km mosaic of the base refl
> > (N0R) and it is completely navigable, so you could do all your plots on
> > the same area and be able to zoom in and out..just an idea.
> > 
> > We have our user committee in town today and tomorrow, so a vist this wek
> > is out, but we have a few slots available next week..
> > 
> > So please send me a sample file of your line plot data, and we can go from
> > there..
> > 
> > Thank you,
> > 
> > -Jeff
> 
> Jeff,
> 
> Yes level 3 data and the base reflectivity of 0.5 degress for now. But they 
> may
> want different angles or the composite in the future. This is the start of the
> project and the NWS folks will be evaluating the Infrasound data for 
> usefulness.
> They may say that the 0.5 angle is too low. The idea is for them to be able to
> see the Infrasound images/lines on one screen and then quickly see the same 
> cell
> on their AWIPS screen to help them identify potential tornado producing cells.
> 
> I have attached a file with 3 lines of data. They are CSV for use in a
> spreadsheet. I also have a program that puts the values into a netCDF file. In
> either case, the latest data line is the one used to generate the line plot 
> when
> the new Nexrad data arrives.
> 
> There are 16 numbers per line:
> 
> The first column is mm/dd/yyyy hh:mm:ss
> Then there are 5 values for each of 3 passbands:
> 
> Passband 1-5 Hz:
> 1. correlation coeficient
> 2. azimuth
> 3. speed
> 4. peak power
> 5. average power
> 
> Passband .5-1 Hz:
> 1. correlation coeficient
> 2. azimuth
> 3. speed
> 4. peak power
> 5. average power
> 
> Passband 5-10 Hz:
> 1. correlation coeficient
> 2. azimuth
> 3. speed
> 4. peak power
> 5. average power
> 
> If the correlation coeficient is > .5, then plot a vector from the Infrasound
> site using the azimuth. Otherwise do not plot a line from the site. There are
> three Infrasound sites: Pueblo, BAO tower, and Goodland.
> 
> After talking to the NWS person who will be evaluating the use of Infrasound 
> to
> detect tornados they would like:
> 
> 1. One radar image per web page
> 2. Only plot line when correlation is >.5
> 
> We need to make a series of plots 3 sites X 3 passbands. The web page will be
> tabbed so they can click on which site-passband they want to see.
> 
> I would be interested in your national composite that is navigable/zoomable. 
> It
> could be another tab for the NWS folks.
> 
> Another thought would be to put the 3 passbands on the same with different
> colors and then evaluate how messy the plot becomes.
> 
> Next Wed and Thurs I am going to the OpenDAP/GIS Unidata conference and taking
> off Fri.
> 
> Thanks,
> 
> Dave
> -- 
> David C. Welsh
> US DoC, NOAA MC R/ET
> 325 Broadway
> Boulder, CO 80305
> 
> O (303) 497-6510  F (303) 497-6978
> http://www.etl.noaa.gov
>