Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Poul-Henning Kamp
In message 52d38720.4000...@rubidium.dyndns.org, Magnus Danielson writes: What CCITT recommendation are you refering to? It was CCIR that did the broadcasting recommendations that we keep refering to. And that's what I'm talking about. The reason UTC got put on radio was that it was

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Tony Finch
Brooks Harris bro...@edlmax.com wrote: You are saying that UTC as a term for the adjusted timescale existed as the process of time-keeping in computers began and they intended computers to reflect civil time even if the details of exactly how to do that hadn't been worked out. Modern UTC, UTC

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Warner Losh
On Jan 12, 2014, at 9:31 PM, Dennis Ferguson wrote: I don't think the fact that they called it GMT at that point tells you anything since referring to UTC as GMT was pretty common in the US at the time. Even the NBS did it. WWV voice announcements referred to the time being transmitted as

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Tony Finch
Warner Losh i...@bsdimp.com wrote: So seeing GMT in early Unix documents doesn't necessarily mean what you think it means, especially given the first hand accounts of participants on this list who specifically asked the people that originally wrote it what the intention behind the words was.

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Warner Losh
On Jan 13, 2014, at 2:30 AM, Poul-Henning Kamp wrote: In message be5b1909-2417-4f36-b5cc-aa2b35e45...@bsdimp.com, Warner Losh write s: http://www.dtic.mil/dtic/tr/fulltext/u2/a280955.pdf Perhaps these documents will prove useful in working out TAI's origin, but it seems that LORAN-C

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Warner Losh
On Jan 13, 2014, at 8:11 AM, Tony Finch wrote: Warner Losh i...@bsdimp.com wrote: So seeing GMT in early Unix documents doesn't necessarily mean what you think it means, especially given the first hand accounts of participants on this list who specifically asked the people that originally

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Poul-Henning Kamp
In message 5036fb31-5cb7-46a6-949e-5534441fe...@bsdimp.com, Warner Losh write s: The development was concurrent, not sequential. Unix 1st and 2nd edition had a 1971 epoch and 1/60th second resolution. 3rd edition moved the epoch to 1972. According to Dennis Ritchie what happened was that they

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Poul-Henning Kamp
In message 8d282b74-4172-4888-8581-9f197314a...@bsdimp.com, Warner Losh write s: The other PTTI docs I posted show that the Navy (USNO) was ordered to = provide technical assistance to the USCG in synchronizing the master = clocks at the LORAN stations in 1960. The LORSTA veterans website

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Michael Deckers
On 2014-01-12 03:28, Brooks Harris quoted from RFC 5905: Then, and very importantly, Figure 4: Interesting Historic NTP Dates states the relationship to First day UNIX - +-++-+---+--+ | Date| MJD| NTP | NTP Timestamp

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Brooks Harris
On 2014-01-13 09:29 AM, Michael Deckers wrote: On 2014-01-12 03:28, Brooks Harris quoted from RFC 5905: Then, and very importantly, Figure 4: Interesting Historic NTP Dates states the relationship to First day UNIX - +-++-+---+--+

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread John Hawkinson
Poul-Henning Kamp p...@phk.freebsd.dk wrote on Mon, 13 Jan 2014 at 16:03:28 + in 86897.1389629...@critter.freebsd.dk: I don't think he told me exactly what representation they used before time_t became 32bit*seconds, but prior to that, the wrap-around of timestamps was prevented only by

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Rob Seaman
On Jan 13, 2014, at 1:54 PM, John Hawkinson jh...@mit.edu wrote: In other news, the count of the number of times in this thread folks have said Universal Time Coordinated instead of Coordinated Universal Time is higher than I would expect. (Coordinated Universal Time is the proper expansion