[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

20011019: gempak ltg gridding

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: 20011019: gempak ltg gridding
  • Date: Mon, 22 Oct 2001 15:09:51 -0600
Brian,

At this point in time, there is nothing within GEMPAK
to make this type of computation as you require.

I would be possible to write a program to accumulate the number
of strikes within a given radius of a grid point.

The other limitation you would have is that a 3km grid is going
to be a very large grid if you are attempting to cover the
entire country with a single grid. At present time, the default
maximum number of grid points in a file is 400,000.
A 4km national grid is approximately 1,200,000 points.

If you are doing a regional (or series of regional) grids
then that won't be a problem.

Steve Chiswell
Unidata User Support





>From: Brian Colle <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200110192245.f9JMje123521

>
>Hi,
>
>I have some gempak lightning data (surface files of sgnl strength) that I
>want to interpolate to a uniformly spaced 3-km gempak grid such that each
>grid point has the number of nearby strikes. With this gridded file I can
>then contour the number density up in gempak. 
>
>Do you have any ideas or sample code how I can do this interpolation 
>of lightning data within gempak or interfacing gempak with f77? 
>
>I appologize in advance for the loaded question, but I am looking
>for ideas at this point.
>
>Thanks for your time...
>
>Brian
>____________________________________________________________
>Prof. Brian Colle         INTERNET: address@hidden
>(631)632-3174
>Institute for Terrestrial and Planetary Atmospheres
>Marine Sciences Research Center
>State University of New York at Stony Brook
>Stony Brook, NY 11794-5000
>