4 ms·Or maybe they mean "day" as starting from UTC midnight.by Gare 2y agoOr maybe they mean "day" as starting from UTC midnight.sevensor 2y agoMaybe they’re contrasting with sidereal days?chgs 2y agoThat was my initial thought, but that’s a difference of 10 mins over 3 days, and that’s orders of magnitudes more precise than should be used.buescher 2y agoI'd guess that's actually more likely. Interesting bit of jargon.