HFU HF Underground
Loggings => HF Mystery Signals => Topic started by: ChrisSmolinski on December 10, 2015, 1213 UTC
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I noticed this on the SDR waterfall this morning, any ideas?
Checking the SDR recording, it appeared at 1009, and has a sweeping sound to it. Off at 1117z.
(http://i.imgur.com/RizbfJx.png)