[netcdfgroup] Combination of nested NetCDF files

• To: "support-netcdf@xxxxxxxxxxxxxxxx" <support-netcdf@xxxxxxxxxxxxxxxx>, "netcdfgroup@xxxxxxxxxxxxxxxx" <netcdfgroup@xxxxxxxxxxxxxxxx>
• Subject: [netcdfgroup] Combination of nested NetCDF files
• From: Brian Etherton <betherto@xxxxxxxxx>
• Date: Fri, 3 Sep 2010 18:42:27 +0000

Good day folks,

This is Brian Etherton, out in North Carolina.  Hope all is well with you guys 
out in Colorado, and all in the netcdfgroup.

I have a quandary, and the information presented to me on the Unidata web site 
is so great as to be overwhelming.  Hence.  My note.

I have a triple nested WRF run, a 27km outer nest, a 9km middle nest, and a 3km 
inner nest.  The 9km and 3km nests move every time step, following a hurricane 
(in this case, Earl).

What I want to do is to combine the three NetCDF files valid at a moment in 
time into one file.  In this new file, I want to use the 3km resolution data 
where I have it, then 9km where I have it, and the 27km where I have it.  In 
essence, I want to remove the 27km data and replace it with the 9km data where 
I can, and remove the 9km data and replace it with the 3km data when I can.  I 
want to maintain the native resolution of my data in all instances.  I do not 
want to degrade everything to the 27km grid.  

My question: what tool would allow me to do this?  I have looked at a few, but 
none has this exact feature.

Thoughts?

Kind thanks,
Brian Etherton