[Met_help] MODE NetCDF files and Grads

[John Halley Gotway]

Jeff,

Yep, the intensity values listed in the MODE output (percentiles and sums)
are computed from the raw field and not the convolved field.  And you're
right, there is no way to access the convolved field - MODE computes it,
derives objects, and throws it away.  If it would be of use, we could
write it out to that NetCDF file, but no one's asked for that yet.

John

> John,
> Perhaps you can help me bypass the issue entirely then.  Really what I
> want
> to find out is whether the INTENSITY_SUM variable in the ASCII output file
> is a sum of the values of the raw field in an object or if it is the sum
> of
> the convolved field in an object.  For my case with rain, is the
> INTENSITY_SUM value a rain volume in an object or is it the sum of the
> convolved values of the rain field in an object?  I really hope it is the
> sum of the values of the raw field, as that would be simpler than if it
> were
> the sum of the convolved field values.   If the latter were the case, then
> I
> would need to be able to access the convolved field itself, which I don't
> see a way to do.
>
> Jeff
>
> On Mon, May 17, 2010 at 9:14 AM, John Halley Gotway <johnhg at ucar.edu>
> wrote:
>
>> Jeff,
>>
>> Unfortunately, no.  I don't have any experience working with GRADS.  I
>> can
>> tell you that you could use ncview and ncdump to inspect the contents of
>> the
>> NetCDF file.  And we do realize that they are
>> not viewable using other software packages, like Unidata's IDV.  Prior
>> to
>> putting out the next release, which we're currently working on, I'd like
>> to
>> make sure that those NetCDF file are viewable in
>> IDV.  It's possible that whatever changes are needed for that will
>> enable
>> them to be compatible with GRADS.  But I'm really not sure.
>>
>> Sorry I can't be of more help.
>>
>> John
>>
>> Jeffrey Duda wrote:
>> > John,
>> > Hello.  I have another set of questions for you regarding MODE.
>> >
>> > I would like to use the ....mode_....._obj.nc files to use as a mask
>> when
>> > working with my wrfout files in Grads.  However, when I try to open
>> the
>> .nc
>> > file using sdfopen, I get an error that says "SDF file has no
>> discernable
>> X
>> > coordinate" and it fails to open the file.  I don't know if you've
>> worked
>> > with Grads before, but do you have any advice on how to be able to
>> open
>> the
>> > object netCDF file in Grads?
>> >
>> > Jeff
>> >
>>
>
>
>
> --
> Jeff Duda
> Iowa State University
> Meteorology Graduate Student
> 3134 Agronomy Hall
> www.meteor.iastate.edu/~jdduda
>