I have recently noticed small spikes, I call them ticks, on the recorder traces on just one axis - EHN They are not there all of the time by have a periodicity of just over two minutes. I have uploaded the latest log file and an example of two helicorder traces one with and the other without the “ticks”.
I have to believe that they are real disturbances from somewhere. To establish the source, the plan is to rotate the whole unit by 90 degrees. That way, I can work out if these are real disturbances or some other “interference” in the unit itself.
Anyone have a similar experience?