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Laurence,
UW8SM is usually a strong signal here but no
indication of a transmission at that time and frequency, so almost certainly a
false positive.
Opds detections with correlation marginally above
15 dB are generally a bit suspicious, especially if accompanied by fairly
good carrier SNR (ie. better than 45 dBOp or so). This usually
indicates that opds has locked on some spurious carrier, eg another
transmission or a Loran line, and the modulation or noise around it
happened to resemble one of the listed callsign patterns. If you have a
well calibrated frequency readout (better than a couple of milliHz), you can
configure opds to ignore lines from specific Loran chains.
Best 73,
Markus (DF6NM)
Sent: Saturday, December 20, 2014 8:06 PM
Subject: LF: OP32Ds decode UW8SM <?>
Not sure but this decoded - cant see any parallel
times decoding on Opera live - just after my dawn yesterday =- don't think
its "real" <?> Especially given magsol over the past 48 hours, but
stranger things have happened
date time call
distance frequency bandwidth snr
correlation
2014-12-19 20:37:37 UW8SM 7738km
137533.126Hz 3mHz -42.9dBOp 71% 15.0dB
Laurence
KL7L BP51IP
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