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[GEMPAK #GPB-329617]: GINI format of FNEXRAD data

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  • Subject: [GEMPAK #GPB-329617]: GINI format of FNEXRAD data
  • Date: Thu, 18 May 2006 13:18:26 -0600
Ying,

The FNEXRAD products I create use the GINI format of the satellite images
using the ICD available from NESDIS:

http://www.weather.gov/noaaport/document/ICD%20CH5-2005-1.pdf

I have used word 43 (eg the data compression indicator) with
value "128" to indicate that the raster portion of the image
is compressed using PNG. Eg, the image is viewable as a standard PNG
image if you start at that part of the data product. Uncompressed,
the image is 14MB.

I create the products using the NEX2GINI program in GEMPAK. I created
a similar program NEX2IMG which can create an image (like gif for example),
which other users are using to create products using mapserver:
http://mesonet.agron.iastate.edu/docs/radmapserver/

Steve Chiswell
Unidata User Support





> Hi Steve,
> 
> How are you? I'm a research assistant at George Mason University and we are 
> working on a project on FNEXRAD data.
> 
> I found "TICZ99 CHIZ" at the beginning of the data, so you should have 
> developed this part and know it best, right -- just my guess ;-)
> 
> Is the format the same as the one for AWIPS satellite data? see  
> http://weather.unisys.com/wxp/Appendices/Formats/GINI.html
> 
> we are able to get the FNEXRAD data through LDM and would like to read it out 
> and display it in a GIS friendly projection. Before I dig into the huge 
> source code of GEMPAK, could I know what's the default projection for GARP 
> and does it deploy any reprojection function from the FNEXRAD GINI format to 
> the default display?
> 
> Thank you so much for your time and I'm really appreciated for the help from 
> all Unidata experts (as what I said a thousand times to Tom Yoksas~~~)
> 
> Have a good day!
> 
> Ying Cao
> ---------------------------
> PhD student
> School of Computational Sciences
> George Mason University
> 
> 


Ticket Details
===================
Ticket ID: GPB-329617
Department: Support GEMPAK
Priority: Normal
Status: Closed