Could you then start to identify which astronaut by the amount? I didn't follow the link to see what other data that is not being used contains, but if there's any other chemical analysis data it could be done. NASA could then solve their funding issues by selling all of that analytics to data hoarders and start showing ads on all of the screens on the ISS. Hell, I'm now surprised that some YC startup hasn't released a Smart Toilet that does this.
Depending on the frequency of data updates, rate-of-change and rate-of-rate-of-change could be calculated and possibly correlated with specific user(s).
