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Physics, Astronomy & Cosmology / Re: Why is NIST basing the new kilogram (kg) definition on gravity?
« on: 02/12/2017 13:37:42 »They don't plan to just measure the Kg once and they will have relative gravimeters in place to measure changes in local g.I hope that's true. I wonder if you could release your sources on this instead of choosing to keep them secret. I'm searching but so far I haven't found a word from NIST saying they're planning to measure lab g more than once. Although it does seem unlikely they'll make such a principle error, I've been surprised before about what experts have missed.