[RegCNET] Domain info

[bixq]

Hi, Monica:

Yes, Maurice's correct.

iy = 35*110 / 50  = 77

and

jx = 45*110*cos(15*3.1415926/180) / 50   = 95,

but considering the map factor of projection, probably you have to use 108 
(or at least 100) for jx, if you want cover the whole window of yours.

And if you further consider to make your window just as inner doamin, then 
you have to use a iy = 100, and jx = 120 domain probably.

Regards,
Xunqiang Bi

On Thu, 3 Dec 2009, Maurice.McHugh at noaa.gov wrote:

> Think I caught a mistake in  Dr Bi's email... the lat lon span of the grid is 35x45 lat/lon, so shouldn't jx be 35*100*cos(15*3.1415926/180) / 50
>                    ^^
> = 74.376 -> = 75??
>
> Maurice
>
>
> ----- Original Message -----
> From: bixq <bixq at ictp.it>
> Date: Thursday, December 3, 2009 11:42 am
> Subject: Re: [RegCNET] Domain info
> To: Monica Santese <monica.santese at le.infn.it>
> Cc: regcnet <regcnet at lists.ictp.it>
>
>
>> iy = 45*110 / 50  = 99
>>
>> jx = 45*110*cos(15*3.1415926/180) / 50   = 95  ==> 96
>>
>> 96 is a good number for parallel.
>>
>> On Thu, 3 Dec 2009, Monica Santese wrote:
>>
>>> Dear users,
>>>
>>> I have a doubt...if I want to simulate a domain  from 15 to 50 in
>> latitude and -15 to 30 in longitude with a grid spacing ds = 50  I
>> have to calculate jx and iy in this way:
>>>
>>> iy= (65*110 km)/50
>>> jx = (45*78 km)/50
>>>
>>>
>>> is it right?
>>>
>>>
>>> Thank you very much
>>>
>>> PhD.Monica Santese
>>> CMCC - Physics Department - University of Salento
>>> via Arnesano - 73100 Lecce, Italy
>>>
>>> e-mail: monica.santese at le.infn.it
>>> phone:  +39-0832-297502 (office)
>>>             +39-0832-297481 (laboratory)
>>> fax:       +39 -0832-297505
>>> ******************************
>>
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>    Dr. Xunqiang Bi         email:bixq at ictp.it
>>    Earth System Physics Group
>>    The Abdus Salam ICTP
>>    Strada Costiera, 11
>>    P.O. BOX 586, 34100 Trieste, ITALY
>>    Tel: +39-040-2240302  Fax: +39-040-2240449
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> _______________________________________________
>> RegCNET mailing list
>> RegCNET at lists.ictp.it
>>
>

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Dr. Xunqiang Bi         email:bixq at ictp.it
   Earth System Physics Group
   The Abdus Salam ICTP
   Strada Costiera, 11
   P.O. BOX 586, 34100 Trieste, ITALY
   Tel: +39-040-2240302  Fax: +39-040-2240449
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~