[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: format conversions



Dorothy,

The most common method for outputting model grids is in GRIB format.
I don't know what "standard" format is referring to.

Dcgrib2 will decode the Arakawa semi-staggered E grids that the ETA
model uses. The rotated/staggered grids have the u,v (V) components
in between the H,P,T,w (H). In order for GEMPAK to do grid computations,
the data must be interpolated to the offset grid points since
data for all fields will need to be present at each grid point, eg:

   H   V   H   V   H

   V   H   V   H   V

   H   V   H   V   H


Steve Chiswell
Unidata User Support

On Wed, 2 Oct 2002, Dorothy Durnford wrote:

> Hi Steve,
>
>     I'm doing a Ph.D. under Professor Gyakum at McGill University in
> Montreal, Canada.  I'll be working with the RPN MC2 mesoscale model.
> This model outputs files in standard format.  I'd like to plot the data
> using Gempak.  So, question 1 is:  do you know of any programs that
> convert from standard format to Gempak format?  Otherwise, I figure,
> since I know the lat-lon values of each grid point, that I could
> actually output a "station list" and a "data" file, then process the
> data as if they were surface observations.  The only problem is that the
> model domain is rotated with respect to the Equator.  So, question 2
> is:  is Gempak able to plot rotated domains?
>
>     Always appreciate your help, Dorothy.
>