The Op-32 detections from last night
are on
which are basically the correlation
hits which were marked by *. The current list of templates
is
Jay appeared again here three times. RN3TTS
was detected for the first time, once at the beginning. WE2XEB was not
copied (yet) - Bob if you could tell your actual transmit
frequency I would try to inspect the spectrogram more closely.
I have collated a gallery of zoomed
spectra and spectrograms
UA4WPF and WD2XNS both have a very well defined
central peak, which proves that their signals are phasecoherent between dashes
and also very stable. RA3YO seems to be phase-coherent as well but
with some frequency variation. The others seem to be sending
incoherently, possibly because their oscillators or dividers are being
restarted with every dash. Experiments with simulated signals have
indicated that my detection threshold seems to be about 6 dB
lower for coherent signals.
BTW Blacksheep still seems to be sick for me. Like
Alan, the last message I got was yesterday 16:38 from
Jay.
Best 73,
Markus
----- Original Message -----
Sent: Thursday, February 21, 2013 11:09 PM
Subject: Re: Op-32 correlation results online
To produce some kind of realtime feedback to
transmitting stations, I will upload screenshots from the
experimental Opera deep-search utility in ten-minute intervals
to
This is unfiltered output, so repeating
partial correlations will often appear in several consecutive time slots.
The "proper" ones with most overlap are marked by an asterisk.
The "mHz" column shows the apparent bandwidth
of the central peak: Coherent stable transmissions will often remain within
1 or 2 mHz, whereas spreading by non-continuous phase will typically result
in 60 to 150 mHz. There are actually two separate carrier searches,
which can lead to the same signal being picked up twice within the same
slot. Peaks on Loran line frequencies are being excluded from
processing.
BTW Again I haven't received anything from
Blacksheep since 17 UT, so I'm currently pretty much blind to email from
the group.
Best 73,
Markus
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