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[Datastream #DNA-532719]: Question Regarding DHR product on FNEXRAD
- Subject: [Datastream #DNA-532719]: Question Regarding DHR product on FNEXRAD
- Date: Tue, 12 Jul 2016 09:38:24 -0600
Hi Justin,
re:
> I am looking to use the DHR composite product through a python
> visualization program and am running into some issues concerning metadata
> (geographic info) -- I don't see any. Am I missing info somewhere that
> provides coordinates?
The projection information is in the compressed GINI file header. We
PNG compress the image portion of the product and leave the header
uncompressed. GEMPAK, McIDAS-X and the IDV all handle these compressed
GINI products without the need to first uncompress the image. I believe
that Michael added an uncompression step in the processing sequence for
AWIPS-II.
re:
> We are looking for a way to convert the data back to dbZ if you have any
> info as well.
The mapping between counts to dbZ is also in the compressed GINI header.
re:
> On LDM, is this file converted to GINI format? I noticed a .rad extension...
All of the NEXRAD Level III national composites that we create for the
LDM/IDD FNEXRAD data feed are sent in a compressed GINI format. The N0R
national composite is also sent as a GRIB2 message.
re:
> Thank you for your time as always.
No worries.
Cheers,
Tom
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Ticket Details
===================
Ticket ID: DNA-532719
Department: Support Datastream
Priority: Normal
Status: Closed
===================
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