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 <[email protected]> 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" <[email protected]>
> Sent: Monday, January 18, 2016 4:28 AM
> To: <[email protected]>
> 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
>
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