[gradsusr] How can we write XDEF to open *.nc files?

[Hoop]

Charles Vanya,

The NARR data are on a Lambert Conformal Conic grid, not a regular
lat-lon grid.  The good news is, there's a standard script for
opening them.  It takes the arguments you give it, writes a
Data Descriptor File (DDF) for the NARR data file, and then opens
it with the "open" command.  The name of the script is "narropen",
and, as I said, it's part of the standard suite of scripts.  It may
be found at:

ftp://cola.gmu.edu/grads/scripts/narropen.gs

You can learn how to call it by running it without arguments.

-Hoop

> Date: Mon, 20 Jan 2014 03:07:34 -0800 (PST)
> From: Charles Vanya <charles.vanya at yahoo.com>
> Subject: [gradsusr] How can we write XDEF to open *.nc files?
> To: "gradsusr at gradsusr.org" <gradsusr at gradsusr.org>
>
> Dear All,
> ?I am novel with GrADS and recently was doing a case study of a lightning
> that killed 8 people at once and same place. As I was trying to load
> cape.2013.nc and cin.2013.nc I encountered an error that I am failing to
>resolve up to now. The error is shwon below:
> =====================================================
>
> ga-> sdfopen c:/Users/CHARLES/Downloads/cape.2013.nc
> Scanning self-describing file:? c:/Users/CHARLES/Downloads/cape.2013.nc
> gadsdf: SDF file has no discernable X coordinate.
> ? To open this file with GrADS, use a descriptor file with an XDEF entry.
> ? Documentation is at http://iges.org/grads/gadoc/SDFdescriptorfile.html
> ga->?======================================
> Now the question is how can I open such kind of data in Grads. I read
> through the mentioned document but it is not helpful to me. Can any one
> help me with guidance and set of commands to open and read this data?
> the data is accessible from
> http://www.esrl.noaa.gov/psd/thredds/fileServer/Datasets/NARR/monolevel/cin.2013.nc?
> Thanks in advance
> ?
> Charles Langton Vanya
> (Principal Meteorologist)
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