40 ms·
Even NIST (1) claims that leap seconds are added to sync UTC with IAT. Your point is that astronomical systems don’t use IAT directly but instead start with UT
by yunohn 4y ago
Even NIST (1) claims that leap seconds are added to sync UTC with IAT.
Your point is that astronomical systems don’t use IAT directly but instead start with UTC and convert across various other systems? Could be, but then the purpose of UTC syncing was lost somewhere. Any idea why?
(1) https://www.nist.gov/pml/time-and-frequency-division/leap-seconds-faqs https://www.nist.gov/pml/time-and-frequency-division/leap-se...
- zokier 4y agoNavy celestial navigation. Naval almanacs by necessity were based on rotation of earth, so that was the timescale that naval organizations broadcast across the earth to support their ships. Eventually that radio broadcast time morphed into UTC, and then was repurposed as general-purpose civil time.