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28. 11 Aug 2012 - Suspected aircraft wingtip vortex echoes detected at station KE6GLA at 2058 and 2108 UTC on 2 meter WSPR signals.
29. Suspected aircraft wingtip vortex echoes detected on 2 meter WSPR signal at station N6GN.
30. 02 Oct 2012 1338 UTC - Spectran analysis of the final 80 seconds of a 2 meter WSPR signal showing the discrete tones. This signal did not decode due to the 25 Hz negative frequency drift over the period. Moving symmetric side images 35 dB down from main signal are observed. The corresponding WSPR waterfall segment is on the right.
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