Re: [ldm-users] NEXRAD3 Again ... part III

All,

We found that the high rate of retransmitted products ended on Monday 08/01 - 
around 14:44 UTC. Up until that point, we were seeing retransmissions at a rate 
of thousands per hour and the difference between the time of original 
transmission and the time of retransmission was around 6000 seconds or between 
1.5 to 2.0 hours. Then, there was a half hour gap between 14:44 and 15:13 where 
no retransmissions were sent, followed by the typical random low rate of 
restrans we're used to seeing. The time difference between the original and the 
retrans product also settled down to a typical 30 and 60 seconds. After 8/01 
14:44, I'd guesstimate that we had already seen 95% of the retransmissions. 
Before that, I'd say it was the inverse (possibly because products were no 
longer in the "seen it" list). Anyway...something happened at 14:44 on the 1st. 
Is anybody aware of any changes made by the NCF/TOC around that time?

I talked to the TOC late yesterday afternoon and they said everything was fine. 
Which I guess, technically, at the time was true but they didn't provide any 
additional information.

What seems really odd to me, is the length of time between the original 
transmission and the restransmission. It's almost as if there is a rogue NWS 
office out there requesting retransmissions long after the product has been 
transmitted. Here, a slug of radar products were retransmitted nearly two hours 
after the original was broadcast. We were also seeing the same for some GRIB 
data.

2011/08/01 00:03:07 Retranmission already exists: skipping "SDUS54 KOUN 
312215"; Secs=6370
2011/08/01 00:03:07 Retranmission already exists: skipping "SDUS54 KOUN 
312215"; Secs=6370
2011/08/01 00:03:07 Retranmission already exists: skipping "SDUS23 KIND 
312211"; Secs=6370
2011/08/01 00:03:07 Retranmission already exists: skipping "SDUS23 KARX 
312214"; Secs=6370
2011/08/01 00:03:07 Retranmission already exists: skipping "SDUS23 KIND 
312211"; Secs=6370

They may have even retransmitted the same product multiple times, unless 
multiple unique products are transmitted under the SDUS54 KOUN header (not up 
on my WMO headers like I used to be).

2011/07/31 22:16:21 Retranmission doesn't exist: saving "SDUS54 KOUN 312215"
2011/08/01 00:01:34 Retranmission already exists: skipping "SDUS54 KOUN 
312215"; Secs=6335
2011/08/01 00:01:34 Retranmission already exists: skipping "SDUS54 KOUN 
312215"; Secs=6335
2011/08/01 00:03:07 Retranmission already exists: skipping "SDUS54 KOUN 
312215"; Secs=6370
2011/08/01 00:03:07 Retranmission already exists: skipping "SDUS54 KOUN 
312215"; Secs=6370


Chad

Chad Johnson
Data Software Engineer
Meteorologist
Weather Central, LP
401 Charmany Drive, Suite 200
Madison, WI 53719
(608) 274-5789 Main
(608) 276-4613 Fax
www.wxc.com

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-----Original Message-----
From: ldm-users-bounces@xxxxxxxxxxxxxxxx 
[mailto:ldm-users-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Jeff Lake
Sent: Tuesday, August 02, 2011 10:11 AM
To: ldm-users@xxxxxxxxxxxxxxxx
Subject: Re: [ldm-users] NEXRAD3 Again ... part III

although I don't think that is related to the problem we all was experiencing
(which looks like has stopped)

but WOW looking at the OAX directory tree there are a
ton of products, some not even listed any where...

-Jeff



>  I received this message this morning:
> 
> 
> NOXX10 KWBC  021418
> DATA MGT MESSAGE 08-11.01
> 
> TO  ALL CUSTOMERS
> 
> FROM  RTH WASHINGTON DATA MANAGEMENT
> 
> SUBJECT  RADAR DATA
> 
> THIS MESSAGE IS TO PROVIDE NOTICE TO ALL CUSTOMERS OF A TEMPORARY TEST
> INVOLVING DISTRIBUTION OF RADAR LEVEL III DATA PRODUCTS DURING INTERNAL
> AWIPS TESTING AT THE WFO OAX OFFICE. THE TEST HAS STARTED AND IS
> EXPECTED TO LAST AT A MINIMUM OF 4-8 WEEKS DURING WHICH AVAILABILITY
> OF THE PRODUCTS WILL INCLUDE ALL CURRENT DATA SETS AND A SMALL SUBSET
> OF ADDITIONAL DATA PRODUCTS. IF YOU FIND ANY PROBLEMS OR HAVE ANY
> QUESTIONS    WE WOULD ENCOURAGE YOU TO NOTIFY THE AWIPS NCF OR THE TOC
> AT YOUR EARLIEST OPPORTUNITY.
> 
> NCF  301.713.9344
> TOC  301.713.0902
> 
> REGARDS
> NWSTG/KMC
> 
> THIS INFORMATION IS ALSO POSTED ON THE NWS DATA MANAGEMENT
> CHANGE NOTICES WEB PAGE. THE URL IS LISTED BELOW.
> 
> HTTP/COLON///WWW.NWS.NOAA.GOV/DATAMGMT/NOTICES.SHTML
> DATA MANAGEMENT
> TELECOMMUNICATION OPERATIONS CENTER
> RTH WASHINGTON SENDS
> NNNN
> 
> Rusty
> 
> Gilbert Sebenste said the following on 8/2/2011 9:42 AM:
>> On Tue, 2 Aug 2011, Rodrigo de Souza Barreto Mathias wrote:
>>
>>> Good morning!
>>>
>>> I've been having a problem with reception of satellite and model 
>>> data. I don't know what is happening, but we stoped receiving these 
>>> data yesterday. But observational data, like SHIP, METAR and SYNOP, 
>>> are normal. Everything seems normal. I don't know if it is a local 
>>> problem or a problem on idd data flux. Does anybody have an idea? Did 
>>> anybody have the same problem last 12 hours?
>>
>> Hello Rodrigo,
>>
>> I saw a period of no model data, but only for second, not all day. I 
>> am geting everything here, and my satellite receiver notes no
>> unusual problems:
>>
>> http://noaaport.admin.niu.edu:8025/
>>
>> Yes, there are some fluctuations, but the range is fairly small; the 
>> small spacing on the carrier to noise ratio chart exaggerates the look 
>> of how much the signal has changed so far today.
>>
>> *******************************************************************************
>>  
>>
>> Gilbert Sebenste                                                     
>> ********
>> (My opinions only!)                                                  
>> ******
>> Staff Meteorologist, Northern Illinois University                      
>> ****
>> E-mail: 
>> sebenste@xxxxxxxxxxxxxxxxxxxxx                                  ***
>> web: http://weather.admin.niu.edu                                      **
>> Twitter: http://www.twitter.com/NIU_Weather                            **
>> Facebook: http://www.facebook.com/niu.weather                           *
>> *******************************************************************************
>>  
>>
>>
>> _______________________________________________
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>> ldm-users@xxxxxxxxxxxxxxxx
>> For list information or to unsubscribe,  visit: 
>> http://www.unidata.ucar.edu/mailing_lists/ 
>


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