[gradsusr] TRMM hourly to daily

[Rupak Rajbhandari]

Dear Krishnamohan  & Ganer,

Thank you very much for your suggestions.

When I display the variable using gxout to grfill it is working fine. But
immediately after the display command, when gxout is set to fwrite and
display the variable is not working.

Honestly I could not understand the problem. Therefore, I resolved the issue
going back to good old FORTRAN.

-rupak



On Wed, Sep 15, 2010 at 1:17 PM, D.W.Ganer <tsd at tropmet.res.in> wrote:

> This is very simple problem. U set x and y as points instead of lat, lon
> while using fwrite.
>
>
>
>  Ganer
>
> ----- Original Message -----
> From: "krishnamohan" <krishmet at gmail.com>
> To: "GrADS Users Forum" <gradsusr at gradsusr.org>
> Sent: Wednesday, September 15, 2010 10:14:36 AM
> Subject: Re: [gradsusr] TRMM hourly to daily
>
>
> Hai Rupak,
>
>         This problem may happen due to the x and y axis you set for using
> fwrite. An easy way to avoid this type of confusion is to write the output
> in netcdf format using sdfwrite command ( above grads version 2.0). An
> example is
>
> 'reinit'
> 'sdfopen uwnd.2009.nc '
> 'set lon 0 360'
> 'set lat -90 90'
> 'set time 01jan2009 04nov2009'
> 'set lev 1000 10'
> 'define u=uwnd'
> 'set sdfwrite uwnd09daily.nc '
> 'sdfwrite u'
>
> This will write the newly defined variable to an external file (here
> uwnd09daily.nc ) .
>
> --
> Krishnamohan.K.S
> Junior Research Fellow
> Department Of Atmospheric Sciences
> Cochin University of Science and Technology
> Cochin,India
>
>
>
> On Wed, Sep 15, 2010 at 9:56 AM, Rupak Rajbhandari <
> rupak.rajbhandari at gmail.com > wrote:
>
>
> Hi,
>
>
> I am trying to convert TRMM 3B42.V6 3-hourly rainfall data files into
> single daily rainfall file using GrADS 'fwrite'. The script is working well.
> But when I compare the newly generated maps with the original, they are
> different. The scales for both the maps are same but the rainfall spots are
> different. I think, there is a mix-up in x,y direction. If this is the case,
> how do I resolve it. As an example, i am attaching a figure
> displaying comparison map and the script file with this mail.
>
>
> Any help in this regard is appreciated.
>
>
> Thanking you,
>
>
> Rupak Rajbhandari
> Department of Meteorology
> Trichandra Campus, TC/TU
> Kathmandu
>
>
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