[Acoustics] RE: Divergence in data from field vs playback

[Victor A Levesque]

Bonjour Francois,

I and others have also noticed the difference between "in the field" 
discharge and after office playback of the same data. The times I have 
seen the difference, some of the screens did not update with each 
ensemble, including the tabular discharge history. There were no lost 
ensembles due to communication problems.


Victor Levesque

U.S. Geological Survey
Center for Coastal and Watershed Studies
Tampa, FL
813-975-8620 extension 167
FAX: 813-975-0839




Rainville,François [CIS-WSB] <Francois.Rainville at ec.gc.ca>
Sent by: acoustics-bounces at simon.er.usgs.gov
12/10/2004 12:47 PM

 
        To:     <acoustics at simon.er.usgs.gov>
        cc: 
        Subject:        [Acoustics] RE: Divergence in data from field vs playback


Please note:
There were several replies from all around and it appears that many also 
noticed the difference.

RDI would be interested to learn more about this issue but would need a 
screen shot of live versus playback screens.
If you are in a situation to capture such screen shot during such 
divergence, please forward it them so they can precisely determine the 
reason.

Back in June, their WinRiver application programmer stated that without 
some serious investigation they could not determine the exact cause for 
the small difference. 
It is possibly due to when the stop is received versus what the 
application is doing at the time. 
The display is lower on the priority scheme than other functions and maybe 
some loop is terminated in the computation or some other reason. 
The display may not be using the last ensemble.

This issue was not a big concern until observed to affect our significant 
values... 
With rivers icing up here, help from warmer climates would be appreciated 
to provide RDI with the data needed to solve this riddle...

Thanks,
F.
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