[Met_help] [rt.rap.ucar.edu #69566] History for horizontal interpolation with copygb

[John Halley Gotway via RT]

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  Initial Request
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Dear met_helpers,

I have a problem when i do some horizontal interpolation with copygb.exe.
I use the command listed on your MET Online Tutorial website:
copygb -g"255 0 NX NY LAT0 LON0 128 LAT1 LON1 DX DY 64" -x in.grb out.grb
NX = 224
NY = 256
LAT0 = 25000
LON0 = 116000
LAT1 = 32000
LON1 = 124000
DX = 1/128
DY = 1/128
The grid resolution I wanted is 1/128 degree (that is 7.8125 millidegree), which is not a integer value.

It is very appreciate if you can help me solve the problem.
Thanks!




chenfeng.iap

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  Complete Ticket History
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Subject: horizontal interpolation with copygb
From: John Halley Gotway
Time: Fri Oct 31 13:50:25 2014

Chenfeng,

Yes, you have discovered the limitations of copygb.  Unfortunately, it
can
only define grids with a resolution of up to 3 decimal places.  You
could
just use something close, like 7.813 degrees instead.

While we do use copygb frequently to regrid data, we do not actually
support the tool through MET.  It is part of the unified post-
processor
(UPP) package and is supported through wrfhelp at ucar.edu.

Sorry I can't be of more help.

Thanks,
John Halley Gotway
met_help at ucar.edu

On Fri, Oct 31, 2014 at 2:00 AM, chenfeng.iap via RT
<met_help at ucar.edu>
wrote:

>
> Fri Oct 31 02:00:57 2014: Request 69566 was acted upon.
> Transaction: Ticket created by chenfeng.iap at gmail.com
>        Queue: met_help
>      Subject: horizontal interpolation with copygb
>        Owner: Nobody
>   Requestors: chenfeng.iap at gmail.com
>       Status: new
>  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=69566 >
>
>
> Dear met_helpers,
>
> I have a problem when i do some horizontal interpolation with
copygb.exe.
> I use the command listed on your MET Online Tutorial website:
> copygb -g"255 0 NX NY LAT0 LON0 128 LAT1 LON1 DX DY 64" -x in.grb
out.grb
> NX = 224
> NY = 256
> LAT0 = 25000
> LON0 = 116000
> LAT1 = 32000
> LON1 = 124000
> DX = 1/128
> DY = 1/128
> The grid resolution I wanted is 1/128 degree (that is 7.8125
millidegree),
> which is not a integer value.
>
> It is very appreciate if you can help me solve the problem.
> Thanks!
>
>
>
>
> chenfeng.iap
>

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Subject: Re: [rt.rap.ucar.edu #69566] horizontal interpolation with copygb
From: chenfeng.iap
Time: Fri Oct 31 23:53:44 2014

Hi John,

Thanks for your reply. I think I should consider other ways to do the
interpolation.

But thanks all the same and have a good weekend.

Feng

发自我的 iPhone

在 2014-11-1，3:50，"John Halley Gotway via RT" <met_help at ucar.edu> 写道：

> Chenfeng,
>
> Yes, you have discovered the limitations of copygb.  Unfortunately,
it can
> only define grids with a resolution of up to 3 decimal places.  You
could
> just use something close, like 7.813 degrees instead.
>
> While we do use copygb frequently to regrid data, we do not actually
> support the tool through MET.  It is part of the unified post-
processor
> (UPP) package and is supported through wrfhelp at ucar.edu.
>
> Sorry I can't be of more help.
>
> Thanks,
> John Halley Gotway
> met_help at ucar.edu
>
> On Fri, Oct 31, 2014 at 2:00 AM, chenfeng.iap via RT
<met_help at ucar.edu>
> wrote:
>
>>
>> Fri Oct 31 02:00:57 2014: Request 69566 was acted upon.
>> Transaction: Ticket created by chenfeng.iap at gmail.com
>>       Queue: met_help
>>     Subject: horizontal interpolation with copygb
>>       Owner: Nobody
>>  Requestors: chenfeng.iap at gmail.com
>>      Status: new
>> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=69566 >
>>
>>
>> Dear met_helpers,
>>
>> I have a problem when i do some horizontal interpolation with
copygb.exe.
>> I use the command listed on your MET Online Tutorial website:
>> copygb -g"255 0 NX NY LAT0 LON0 128 LAT1 LON1 DX DY 64" -x in.grb
out.grb
>> NX = 224
>> NY = 256
>> LAT0 = 25000
>> LON0 = 116000
>> LAT1 = 32000
>> LON1 = 124000
>> DX = 1/128
>> DY = 1/128
>> The grid resolution I wanted is 1/128 degree (that is 7.8125
millidegree),
>> which is not a integer value.
>>
>> It is very appreciate if you can help me solve the problem.
>> Thanks!
>>
>>
>>
>>
>> chenfeng.iap
>


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