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If I was unaware of the specification, the way I would go about finding the velocity random walk is to integrate under the PSD curve and take the square root to find the acceleration noise level in g's, and then integrate that value with respect to my time period (.25s). That would give me random walk in micro-m/s, which of course is not the same units as the spec I've been given. I imagine that the reason velocity random walk is in these particular units is to manage its time-dependence, but I'm not sure how or why.

Can anybody provide insight into 1. why the units are what they are, and 2. how I would go about getting from my noise PSD to velocity random walk?

Thanks!

Melissa