[IDV #MLX-680484]: Problems with MM5 Netcdf Sigmalevel an IDV

Hi Florian-

> and thank you for the quick response,
> I put a copy of the file on:

For sigma, the formula needs the base pressure and the
top  pressure (PTOP).  I didn't see a PTOP variable in
the file and I'm guessing that pstarcrs is the base
pressure.  What is PTOP for this file?

Don

> >2008/4/4, Unidata IDV Support <address@hidden>:
> >
> > >Hi Florian-
> >
> > > I would like to view my MM5 model output with IDV 2.4. I converted the
> > MM5
> > > output to netcdf Format with a tool available on MM5 Homepage. Its
> > possible
> > > to open the file in IDV and create 2D plots but IDV can't create 3D
> > displays
> > > because it doesn't recognize the sigma coordinate:
> > >
> > > "Unkown vertical coordinate with Unit null, using linear scale to
> > Altitude"
> >
> > >The problem is that the netCDF format that gets produced does
> > >not have the necessary information to convert from sigma to
> > pressuer/height.
> > >It needs to use something like the CF convention to specify what
> > >parameters are needed for the conversion.
> >
> > > I read in the support email archive that other users had similar
> > problems
> > > but i didn't find a solution for this problem. It would be nice if you
> > could
> > > tell me if there is a way to tell IDV how to use the file correctly. I
> > > attached  a copy of the file to this email.
> >
> > >The attachment wasn't there or didn't come through.  Can you resend
> > >it?  I'll see if this can be done through NcML.
> >
> > >Don Murray
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: MLX-680484
> > Department: Support IDV
> > Priority: Normal
> > Status: Open
> >
> >
> 
> 


Ticket Details
===================
Ticket ID: MLX-680484
Department: Support IDV
Priority: Normal
Status: Open