8860 USB Odd Signal

Caught this one in progress at 0900z on 8860u:



http://ift.tt/1pMM0cQ

(warning--1.6 MB)



I fiddled with the filter widths and other settings to try to get the signal better, so you'll hear some audio changes.



It dropped off as of 0908z, but it's back up now as of 0912z



Anyone have any idea what this is?



Thanks,

Mike

8860 USB Odd Signal