Re: [ldm-users] uniwisc feed receive times

Thanks for the descriptions!  I always like to turn my black boxes into a shade 
of grey, whenever possible.

Much appreciated,

Chris
-- 

 Dr. Christopher G. Herbster
 Associate Professor
 Director of Science and Technology
 for the ERAU Weather Center
 Applied Aviation Sciences
 Embry-Riddle Aeronautical Univ.
 600 S. Clyde Morris Blvd.
 Daytona Beach, FL 32114-3900
 
 386.226.6444 Office
 386.226.6446 Weather Center
 http://wx.erau.edu/

Schedule at:  http://wx.erau.edu/faculty/herbster/Schedules/


-----Original Message-----
From: ldm-users-bounces@xxxxxxxxxxxxxxxx 
[mailto:ldm-users-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Hughes, Brian
Sent: Thursday, March 30, 2017 10:43 AM
To: ldm-users@xxxxxxxxxxxxxxxx
Subject: Re: [ldm-users] uniwisc feed receive times

Hi Chris,

Long ago, I managed the system which processes the current GOES images for 
NOAAPort. The GVAR is received at NOAA's Satellite Operations Facility (NSOF) 
in Suitland, MD (Wallops handles uplink and telemetry, and some backup image 
processing) and the GOES Ingest and NOAAPort Interface (GINI) waits until a 
scan is almost complete or complete, then uses McIDAS to re-project the images, 
adds some NOAAPort comms headers and trailers (TIGExx, TIGWxx, TIGNxx, etc) 
then transfers the processed images over to the NCF for uplink to NOAAPort. 

The GOES-R to NOAAPort process was designed to minimize latency as much as 
possible and enable the 1 min or 30 sec temporal coverage. (The GOES sats have 
had 1 min scan capability all along, but it was only allowed for research 
purposes since AWIPS could not handle the 1 minute schedules. This "Super Rapid 
Scan Operation" would cause the NWS to receive "Routine" schedule only because 
SRSO schedule could not be used concurrently with the 7.5 minute "Rapid Scan", 
and why GOES-R proving ground could only use the backup GOES-14 in SRSO during 
the summer when backup GOES sats would be routinely taken out of storage for 
testing)

-Brian

Brian K. Hughes, PMP, ITIL v3 | Director | Weather Information and Technology 
Solutions Unisys | Federal Systems | Direct 703-234-9875 | Cell 443-614-6026 | 
brian.hughes@xxxxxxxxxx | weather.unisys.com
2476 Swedesford Road | Malvern, PA 19355


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Message: 1
Date: Wed, 29 Mar 2017 18:07:23 +0000
From: David Fitzgerald <David.Fitzgerald@xxxxxxxxxxxxxxxx>
To: "Herbster, Christopher G." <herbstec@xxxxxxxx>,
        "'ldm-users@xxxxxxxxxxxxxxxx'" <ldm-users@xxxxxxxxxxxxxxxx>
Subject: Re: [ldm-users] uniwisc feed  receive times
Message-ID:
        <958EF916EB06874283F9B8F820726DD301D5A192CE@xxxxxxxxxx.local>
Content-Type: text/plain; charset="us-ascii"

Thanks for the info.  You helped clear things up.

Dave

From: Herbster, Christopher G. [mailto:herbstec@xxxxxxxx]
Sent: Wednesday, March 29, 2017 1:29 PM
To: David Fitzgerald <David.Fitzgerald@xxxxxxxxxxxxxxxx>; 
'ldm-users@xxxxxxxxxxxxxxxx' <ldm-users@xxxxxxxxxxxxxxxx>
Subject: RE: uniwisc feed receive times

Hi Dave,

The timestamp of the image is the time that the scan began.  There are many 
different scanning strategies and regions, and each of them takes a different 
amount of time to complete.

Speculating that the routine schedule was in place for yesterday, and using 
this resource 
https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ospo.noaa.gov%2FOperations%2FGOES%2Feast%2Fimager-routine.html&data=02%7C01%7CBrian.Hughes%40unisys.com%7Cf223f0835a8a4f2a2d6a08d476ce9d91%7C8d894c2b238f490b8dd1d93898c5bf83%7C0%7C0%7C636264077164261686&sdata=opnb6tgIRnPTn%2BmSNJwSN%2BkrrX2jC9GbNP2ndXgwA8s%3D&reserved=0,
 I see that a typical 1345 UTC image would be the Northern Hemisphere Extended 
sector, which takes 14:15 (14.25 minutes) to complete.  This image did not 
complete until 13:59:15.  I do not know the magic that occurs to bring the 
images into the LDM IDD feed, but there is much less latency than you might 
think there is given the time to conduct the sector scan.  A full disk image, 
done every three hours for WMO data sharing, takes 26:02.

We have a NOAAPort ingest system, so we get some data that way.  Those images 
are first downloaded to Wallops Island, and then bounce around through some 
absurd number of miles to get to our dish.  (I really do not know enough about 
this to say any more, and may have already stepped outside of an accurate 
description.)

I hope this helps,
Chris H.

--

Dr. Christopher G. Herbster
Associate Professor
Director of Science and Technology
for the ERAU Weather Center
Applied Aviation Sciences
Embry-Riddle Aeronautical Univ.
600 S. Clyde Morris Blvd.
Daytona Beach, FL 32114-3900

 386.226.6444 Office
386.226.6446 Weather Center
***********

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