Message-ID: <0DEE0AE714B349A689461AF130A4301C@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <54B27BEB.3956.9F1641@mike.dennison.ntlworld.com>
In-Reply-To: <54B27BEB.3956.9F1641@mike.dennison.ntlworld.com>
Date: Sun, 11 Jan 2015 20:17:12 -0000
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Subject: Re: LF: Opera true/false?
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Status: O

Tnx - Mike

 The reliable, true Deep Search reports (shown in green) included
SV8CS de SP5XSB, RN3AGC de 2E0ILY and RN3AGC de G0KTN, which are all
 paths that would not have been reported without Deep Search.


> More probable are various reports of LA3EQ's QRP tests overnight by
> DL-SWL, though the report from RW3ADB may not be good.

See   QRP   work around  to  give  local  time  stamp


> A couple of times, a station was decoded by Deep Search, and then 10
> minutes or so later were reported by the same station using regular
> Op at a much higher S/N. This effect is also seen on OPDS.

Most likely are  keying  side  bands  being  detected ,  with  40 + dB 
range ,  signals  well  down  on the  main carrier , are  detected  as  well 
as  the  main  ,  we first  noticed this  with  wspr-2  on 500  , where 
spots  popped  up   50  or  100  Hz off  net  due to  hum  on psu's , same 
could be  seen on spec-lab ...

> Amongst the obviously false ones are SV8CS and 2E0ILY reporting
> JA8SCD who claimed to be running very low power. SV8CS was also
> reported by JA8SCD/1 but was not reported in Europe at the same time.

These   should  of been  flagged  ''??''

> Just looking at a single night it appears that the current system of
> red = 'probably not' and green = 'highly likely' (my description)
> works well.

If its  a loan Wolf decode ,  then  the  psk-map   data  base should be 
able  to give  supporting  data ,
 if the TX beacon is  logged then the  time  can be  checked against  the 
'' stop   +/- time''


73-Graham
G0NBD


--------------------------------------------------
From: "Mike Dennison" <mike.dennison@ntlworld.com>
Sent: Sunday, January 11, 2015 1:34 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: LF: Opera true/false?

> In the last 24 hours on 136kHz there have been several Opera decodes
> flagged up with question marks (and shown in red), indicating they
> need further examination to determine whether they are genuine true
> decodes.
>
> Amongst the obviously false ones are SV8CS and 2E0ILY reporting
> JA8SCD who claimed to be running very low power. SV8CS was also
> reported by JA8SCD/1 but was not reported in Europe at the same time.
>
>
> A couple of spots of UA4WPF are unlikely, especially one by JA8SCD/1
> over a daylight path.
>
> More probable are various reports of LA3EQ's QRP tests overnight by
> DL-SWL, though the report from RW3ADB may not be good.
>
> The reliable, true Deep Search reports (shown in green) included
> SV8CS de SP5XSB, RN3AGC de 2E0ILY and RN3AGC de G0KTN, which are all
> paths that would not have been reported without Deep Search.
>
> Just looking at a single night it appears that the current system of
> red = 'probably not' and green = 'highly likely' (my description)
> works well.
>
> A couple of times, a station was decoded by Deep Search, and then 10
> minutes or so later were reported by the same station using regular
> Op at a much higher S/N. This effect is also seen on OPDS.
>
> The only minor problem is that reports of your own signal are also
> shown in red, which is slightly confusing.
>
> So far, so good.
>
> Mike, G3XDV
> ==========
>
>