In message <c5e4ee4d.6481%james.p....@jpl.nasa.gov>, "Lux, James P" writes:
>On 3/17/09 5:58 AM, "Arnold Tibus" <arnold.ti...@gmx.de> wrote: > >> Interesting facts: >> The GPS navigation system has GPS Time as its basis. Galileo >> will have TAI as its basis. GLONASS has UTC as its basis, >> Air traffic controllers are using UTC. >> > >The latter is probably because air traffic control is basically done at a >resolution of 1 minute [...] The underlying requirements is 10 seconds, and many ATC installations have special UTC clocks with five digits because that makes it pretty hard to get it wrong. One does pause on seeing a clock with 12:34:5 where the last digit clearly isn't dead, because there is no space for it :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
