Comparison between two files with different resolution

[Sachin Ghude]

Dear all,

I am trying to calculate mean between product 1 (2.8X2.8 degree of resolution), product 2 (2.8X2.8 degree of resolution) and  product 3 (1X1 degree resolution).  I do not know how to increase the resolution of  product 3 to 2.8X2.8 degree.

Regards

Sachin Ghude

---------- Original Message -----------
From: Arlindo da Silva <dasilva at ALUM.MIT.EDU>
To: GRADSUSR at LIST.CINECA.IT
Sent: Wed, 14 May 2008 11:23:56 -0400
Subject: Re: Comparison between two files with different resolution

> On Wed, May 14, 2008 at 10:32 AM, Arlindo Meque <mequitomz at yahoo.com.br> wrote:
>
>

Dear all,
>
> I am trying to do a comparison between   GFS products (1X1 degree of resolution) and RFE products (0.1X0.1 degree resolution).  I do not know how to decrease the resolution of RFE products to 1X1 as GFS.
>
>
> Your best bet would be use use the extension re() or the older regrid2() UDF  with the box-averaging method. Documentation for re() is here:
>
>    http://opengrads.org/doc/udxt/re/
>
> None of these are yet available with GrADS v2. The built in lterp() function in GrADS v2 will very likely introduce aliasing when going to a much lower resolution, so I'd not recommend it.
>   Arlindo
>
> --
> Arlindo da Silva
> dasilva at alum.mit.edu
------- End of Original Message -------

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