FFTPower miscalculation when data cadence changes and rank 1 waveform is used

[jbfaden]

Keith nicely isolated a case with Cluster WBD data where a change in the data cadence results in inconsistent results, as if a constant cadence throughout the operation is assumed.

[jbfaden]

I've removed all the 10x cadence parts used when calculating cadence. It's confusing to have any variable where 10x cadence is stored, just store the cadence, even if there is an unnecessary division.

[jbfaden]

The code is correct now. The problem was that I'd broken the code which would detect where translation was changing over time.

[jbfaden]