[gradsusr] Few basic questions on processing of TRMM data in GrADS

[Thiago Veloso]

  Dear Subash,
  To display the averga of your variable, you could try the "ave" GrADS command. Please find the syntax here: http://www.iges.org/grads/gadoc/gradfuncave.html.
  Alternatively, you could try netCDF-specific tools such as NCO or CDO.
  Hope this helps,
  Thiago Veloso.

--- On Tue, 1/2/11, Subash Yeggina <subash.yeggina at gmail.com> wrote:

From: Subash Yeggina <subash.yeggina at gmail.com>
Subject: Re: [gradsusr] Few basic questions on processing of TRMM data in GrADS
To: "GrADS Users Forum" <gradsusr at gradsusr.org>
Date: Tuesday, 1 February, 2011, 3:22

Hi! Teddy,

Thanks for the quick response.

I actually have downloaded NetCDF files from NASA site: (http://mirador.gsfc.nasa.gov/) for 5 years (both daily and 3 hrs). I tried displaying for 1 day and it works fine.  How do 1 do it for 1 year. For example : Displaying the average of 5 years precipitation of my region ?



On Tue, Feb 1, 2011 at 1:16 AM, Teddy Allen <teddyallen at yahoo.com> wrote:


You can easily retrieve TRMM data in a netcdf format from the IRI data library so that it is easily read into grads. 
Go to: http://iridl.ldeo.columbia.edu/SOURCES/.NASA/.GES-DAAC/.TRMM_L3/.TRMM_3B42/.v6/.daily/.precipitation/

From there you can subset your data (click on data selection link) then download into NetCDF (data files selection link). Or you can even access the OpenDAP link as well.
 
Once you have this TRMM NetCDF file you can then easily ingest into GrADS through:
'sdfopen filepath/filename.nc'
'd precip'
 
hope this helps,
teddy 
 
http://www.teddyallen.com
"To move quickly, go alone. To move far, go together." 
African Proverb






From: Subash Yeggina <subash.yeggina at gmail.com>
To: gradsusr at gradsusr.org

Sent: Mon, January 31, 2011 2:31:57 PM
Subject: [gradsusr] Few basic questions on processing of TRMM data in GrADS


Hi! All, 


I am a beginner in using GrADS to process TRMM data. The question I have are:


(1) To process TRMM (3B42 daily and 3hr) data for a period of 5 years. Do I need to write a script or a template control file(.ctl) is to be created?
(2) Are there any tutorials available in using GrADS for TRMM data?




Thanks and Regards,
Subash Yeggina
Research Scholar,
Dept of Civil Engg.
IISc.


      
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