[Lowfer] early T/A

[jrusgrove at comcast.net]

Neil

Once the signal reaches the 15 dB threshold it is considered a valid reception. Processing of 
additional FFT data files can improve the already valid reception.

Jay



----- Original Message ----- 
From: "Neil Klagge" <lowfer.nklagge at gmail.com>
To: "Discussion of the Lowfer (US, European, &amp,UK) and MedFer bands" <lowfer at mailman.qth.net>
Sent: Saturday, November 02, 2013 9:47 PM
Subject: Re: [Lowfer] early T/A


> OK, so I guess that the pgm is assuming it will be a complete decode
> several minutes later than the time it is currently processing?
>
> Odd.
> Thanks Jay.
>
> NK
>
> w0yse, Layton Utah
>
>
> On Sat, Nov 2, 2013 at 7:41 PM, <jrusgrove at comcast.net> wrote:
>
>> Neil
>>
>> I asked this of Markus some time back ... here is his response:
>>
>> "It is normal that each sequence is picked up in several consecutive FFT
>> slots with varying degree of temporal overlap, producing partial
>> correlations. A spot is displayed as soon as the correlation peak reaches
>> the 15 dB threshold, which often happens many minutes before the sequence
>> is really completed. The early results are replaced by later ones if these
>> are better, ie. higher correlation dB's in the rightmost column. Usually
>> (but not always) the best detection occurs around the time of highest
>> overlap."
>>
>> Jay
>>
>>
>>
>> ----- Original Message ----- From: "Neil Klagge" <lowfer.nklagge at gmail.com
>> >
>> To: "Discussion of the Lowfer (US, European, &amp,UK) and MedFer bands" <
>> lowfer at mailman.qth.net>
>> Sent: Saturday, November 02, 2013 9:30 PM
>> Subject: Re: [Lowfer] early T/A
>>
>>
>>
>>  Jay, why is the most recent decode always about 15 minutes ahead of zulu
>>> time on your grabber?  Is that time synced to your computer clock:?:?
>>>
>>> Neil Klagge
>>>
>>> w0yse, Layton Utah
>>>
>>>
>>> On Sat, Nov 2, 2013 at 2:59 PM, <jrusgrove at comcast.net> wrote:
>>>
>>>  Markus making the trip on OPDS32 at 2024Z ...
>>>>
>>>> http://www.w1vd.com/OPDSgrabber.html
>>>>
>>>> Jay W1VD  WD2XNS  WE2XGR/2  WG2XRS/2
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