More than one detection/decode is then used to certify the spot.
Certify the spot? The fact that someone else somewhere received a spot means that your spot
certified good? Really? No further corroboration necessary?
With DF6NM's OPDS system there's the correlation % and dB 'certainty' indicator, an accurate time
indicator of the transmission and a highly accurate frequency readout that are all used for
corroboration.
Jay W1VD WD2XNS WE2XGR/2
----- Original Message -----
From: "Graham" <[email protected]>
To: <[email protected]>
Sent: Wednesday, January 14, 2015 4:17 PM
Subject: Re: LF: Opera -Just a 2 mins carrier gives ghost detection.
Jan,
As posted , any decode in dynamic , will only show calls from the list , this is the bill
for the extra 5/6 dB gain ..
your spots are pre-fixed with ''??'' this is added by the web-linked system and
denotes a unique detection , false Opera decodes have a call sign format , with random
characters.
Deep Search ??
More than one detection/decode is then used to certify the spot
To check the validity , you can use the psk-data base , which holds the web-tx beacon
and rx-spot time stamped , Opera 8 Dynamic resolves in 0>2 mins , Op32Dy 2 >5 Mins after
tx /end/decode
Otherwise , the system provides the quality check ...
false ....
19:31 477 SV8CS de NL9222 Op8 Deep Search ?? 1260 mi -35 dB in Mijdrecht with 0.1w + Marconi
"T"
Ok ...inside the 2<>5 Min processing time for op32 dy , G3XDV validating
the tx /rx time
20:21 136 G8HUH de EA5DOM-RX Op32 Deep Search 889 mi -41 dB in Albir RX Site
20:17 136 G8HUH de G3XDV Op32 124 mi -13 dB F:0% in Welwyn IO91VT
73-G,
--------------------------------------------------
From: "pa3abk" <[email protected]>
Sent: Wednesday, January 14, 2015 8:38 PM
To: "blacksheep" <[email protected]>
Subject: LF: Opera -Just a 2 mins carrier gives ghost detection.
This eve I monitored MF Opera, however my WSPR timer was operational the same time giving a 2 min
carrier at h10, h30 & h50.
Sorry for the unwanted QRM, however to my surprise NL9222 detected following:
18:51 477 SV8CS de NL9222 Op8 Deep Search ?? 2027 km -35 dB in Mijdrecht with 0.1w + Marconi
"T"
19:11 477 LA3EQ de NL9222 Op8 Deep Search ?? 693 km -37 dB in Mijdrecht with
0.01w + Marconi-T
19:31 477 SV8CS de NL9222 Op8 Deep Search ?? 2027 km -35 dB in Mijdrecht with 0.1w + Marconi
"T"
NL9222 is 42km from me and receives my sigs at +1dB
No other stations detected these stations. I assume they were not QRV either.
Maybe on LF?
I have the feeling that Opera DS is acting more human than desired.
It's the same when a CW human taker is decoding a plain language text in heavy
QRM at QSA 0.
You assume that certain patterns is forming a plain word which match the look_up table you have
stored in your brain.
Jan/pa3abk
--
pa3abk <-> dordrecht jo21it
Sent by Philips STB-75 with T100
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