Message-ID: <BLU403-EAS21CCB3F52FC303F8BDE058CFC00@phx.gbl>
From: Laurence KL7 L <hellozerohellozero@hotmail.com>
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Date: Mon, 18 Jan 2016 12:46:34 -0900
References: <569C69EC.7010906@telus.net> <F6DE9D64E261486DA454671269E47857@AGB>
To: <rsgb_lf_group@blacksheep.org>
In-Reply-To: <F6DE9D64E261486DA454671269E47857@AGB>
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Subject: Re: LF: Opera decode
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Status: O

We did the same sort of thing a few days back to validate ja5np decode of xpq - time and exact frequency were good...

L

> On Jan 18, 2016, at 12:40, Graham <g8fzk@g8fzk.fsnet.co.uk> wrote:
> 
> John,
> 
> ''Decode from LA4ANA''  -
> 
> That is the  output from the  dynamic DETECTOR  , ie  pattern matching
> correlation  detector, provided as a  second lower  s/n  detection  system,
> should the  Opera DECODER fail  to recover the  transmission.
> lower limit for op32 ~ -40 dB s/n
> 
> The Dynamic detector attempts to  'pattern match'  the  Tx  010100   profile
> ,a primitive  'Painting by numbers' system if you like,  dynamic is  set to give ~ -6 dB
> advantage.
> 
> The issue of  false detection/real call signs is  addressed in the Opera Dynamic system
> and the system output, clearly indicates when the  spot is  Opera  or Dynamic, validated
> or not.
> 
> False opera  decode =  call  sign format  'random characters'
> False  dynamic detection  =  call  sign from  list ,  wrong  time  stamp
> 
> Deep Search ?? =   Not Validated
> 
> In the  case of a  non-validation '??'  ,
> 
> its  to the  users to evaluate the  situation ,
> was the  station  sending ?
> is the  frequency  that  of the  detected station ?
> is the  time  stamp  aligned  with the  expected Tx ?
> 
> Issues with the  psk-map seem to be a common  theme,  the  system uploads have not
> changed , but  map-housekeeping routines  could be  removing  swl markers
> 
> 73-Graham
> G0NBD
> 
> 
> 
> 
> 
> 
> 
> --------------------------------------------------
> From: "John Gibbs" <jgibbs@telus.net>
> Sent: Monday, January 18, 2016 4:28 AM
> To: <rsgb_lf_group@blacksheep.org>
> Subject: LF: Opera decode
> 
>> Decode from LA4ANA  just after local sunset here..  was this station even
>> on air at 18_0141 utc ??? Must be bogus.
>> Anyone know why version of  Opera v1.5.8 on LF or MF  would not show on
>> PSK map.  Earlier versions used to.
>> 
>> 03:06    136 WE2XPQ de VE7BDQ Op32 Deep Search ?? 2147 km -43 dB in
>> SOUTHDELTA BC 1474.1 Hz with 10w + Marconi
>> 01:41    136 LA4ANA de VE7BDQ Op32 Deep Search ?? -42 dB in SOUTHDELTA BC
>> 1531.3 Hz
>> ***********  18/01/2016  ***********
>> 
>> 73  John / VE7BDQ
>