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[Datastream #HIG-707765]: Problems with neartime archive



Hi Kwan,

re:
> Yes, I am still with NOAA.  I can't seem to remember the reason I
> have started using my yahoo address to communicate with you though.

OK.

re:
> (Should I use my NOAA address instead?)

I personally try to use my work email for work-related things and my
private email for non-work-related things.  Which you choose, of course,
is your choice.

re:
> Thanks for directing me to the NEXRCOMP archives.  I was looking in
> the decoded section from the unidata3-new main page. That's why I
> could not find them.

OK.

re:
> So these file in http://atm.ucar.edu/native/radar/composite/gini/ are
> referred to as "raw" data.

All images that are filed in the directory hierarchy that I pointed
you to are in the same format as they are transmitted in the IDD,
so we refer to them as being in "native" format.  This means that
users of packages other than the ones provided by us (McIDAS-X, IDV
and GEMPAK) will likely need to "decode" the images into standard forms.
The ldm-mcidas package that I support contains the "decoders" (more like
uncompressors) for the PNG-compressed AREA images in the Unidata-Wisconsin
datastream (IDD feedtype UNIWISC aka MCIDAS) and Zlib-compressed GINI
images in the NOAAPort SBN-derived datastream (IDD feedtype NIMAGE).

re:
> I suppose they are directly readable in McIDAS (e.g. imglist), right?

In Unidata McIDAS-X, yes.  In SSEC's distribution of McIDAS, no.

re:
> I see that the n0r is 1km res., n1p  2km, ntp  4km.  What about the
> other four categories, dhr, dvl, eet, hhc?  What are they?

They are have 1 km resolution.

I will be interested in your opinion of the newer composites.  I
personally like the HHC (Hybrid Hydrometeor Classification)
composite.

Cheers,

Tom
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Ticket Details
===================
Ticket ID: HIG-707765
Department: Support Datastream
Priority: Normal
Status: Closed