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[Datastream #DKY-639434]: Level III NexRad Archive (Intermittent)
- Subject: [Datastream #DKY-639434]: Level III NexRad Archive (Intermittent)
- Date: Thu, 11 Jul 2013 12:24:09 -0600
Hi Gary,
re:
> Your response is greatly appreciated. In support of our Skywarn operations
> I spent months of research creating software which reads WSR-88d binary
> files, including 0.5 deg bref, srm, and cc, and locates rotational couplets
> associated with tornado activity. The software which performs this
> function resides on our Skywarn server. The process used is very similar to
> that used by NOAA's Weather & Climate Toolkit. Using a graphical user
> interface, the directory of the WSR-88d files is read providing a list and
> we select a time stamp of interest. Once selected, the software downloads
> (via http) the associated NOQ, NOS, and NOC files and graphically renders
> the results on a viewer which also indicates whether any low level rotations
> or tornado debris signatures were detected. Our analysis of a past event
> may involve reviewing dozens of images from vicinity NexRad sites. Research
> to date has shown very close correlation between rotational couplets and
> actual paths of damage.
If you were being feed the Level III products via the IDD, you could skip the
step you describe as:
"Once selected, the software downloads (via http) the associated NOQ, NOS,
and NOC files ..."
since the data would already be resident on your server.
re:
> The Unidata NexRad Level III archive is tremendously useful in allowing
> review of past storm events long after the data disappears off the RPCCDS
> servers.
One of the problems you will likely run into is the length of the archive
we maintain -- this changes as our storage resources become full (there
is continually more data to make available online).
FYI: I believe that there are several Skywarn sites around the country
who are getting data vi the LDM/IDD.
re:
> The NCDC archive might be useful - any more one has to wait weeks
> for the data to appear on it dampening its usefulness for our purpose.
Yup, we know what you mean. I think what we all want is some sort of
cloud based rolling "real-time" archive; we are investigating this sort
of a "solution". The only problem with a cloud-based approach is the
network bandwidth used (in and out) is not cheap like cloud-based
CPU cycles are.
re:
> FYI - our skywarn server has two IPs - 192.232.247.221 and 192.232.247.220.
>
> Your Unidata NexRad Level III archive appears to be one-of-a kind. So
> tremendously useful for research and development!
re:
> As far as setting up our own LDM.........really don't think that is
> necessary at this time.....real-time data is still pulled from the RPCCDS
> ftp gateway.
It is our preferred approach for sites that need data on a continuing
basis since it uses a LOT less resources on our side.
re:
> The Unidata archive would only be accessed while
> post-researching significant storm events which hopefully won't happen very
> often. But when we do investigate a past storms......it would be greatly
> helpful if the Unidata server would not keep cutting off the data during our
> work.
Please tell us fully-qualified name and IP address of your machine(s) that
you are experiencing disruption on, and we will investigate the situation
further.
re:
> Hope this gives you the information you need. Please let me know if you
> need any additional. Your assistance is greatly appreciated.
Cheers,
Tom
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Ticket Details
===================
Ticket ID: DKY-639434
Department: Support Datastream
Priority: Normal
Status: Closed