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Shortwave Data Decoding - Discussions regarding decoding digital signals on the HF bands, including HFDL, ALE, RTTY, CW, and others.

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Old 05-24-2017, 1:29 AM
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Old 05-24-2017, 3:11 AM
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We have several links to waterfalls here...

HF Appendix - The RadioReference Wiki

This is outside the ham bands (altho MARS ops often are), so I don't think this is a ham-related mode, but you never know. This looks like about 6975 khz (is that right?); did you check the UDXF logs for possible IDs?

The short bursts suggest something along the lines of a PACTOR mode, but that is a WAG

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Old 05-24-2017, 9:59 AM
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Looks like CW "NT".
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