To check whether the krypton noise is sonic related, I've been doing some tests, changing the sonic data rate.
As of 10:42, it is now set to A9 (10sps). I'll leave this running for a few minutes to allow me to go back and look at the data.
10:50 set back to Ac (20sps).
(It looked like the winds were bad for this time period, so I didn't think much data would be lost.)
P.S. The data that I captured appear to have 2Hz noise in both configurations.