Re: [LEAPSECS] Leap seconds, precision time, and technical progress

2010-12-26 Thread Poul-Henning Kamp
ion because it is (currently) neither >constant nor predictable to a sufficient degree. Nor is it, for that matter, "universal" in any relevant meaning of the word. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD commit

Re: [LEAPSECS] Ghosts of Leap-seconds past and future

2010-12-26 Thread Poul-Henning Kamp
In message <83e442cd-4a84-4493-8e60-867af882b...@noao.edu>, Rob Seaman writes: >I wrote: > >>> Which is why the international civil timekeeping standard should be tied to >>> physical reality. > >...but Poul-Henning Kamp said: > >> 1. There i

Re: [LEAPSECS] POSIX and C (Was: Re: ISO Influence)

2010-12-25 Thread Poul-Henning Kamp
The entire point of the Meter Convention and of eliminating the leap-second hack from UTC, is that we don't need to deal with each government one by one. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer

Re: [LEAPSECS] POSIX and C (Was: Re: ISO Influence)

2010-12-25 Thread Poul-Henning Kamp
ive matter. 2. Nobody but the respective legal entities can decide what it should be tied to. 3. As we all have seen amply documented. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD sin

Re: [LEAPSECS] DCF 77

2010-12-24 Thread Poul-Henning Kamp
ng that the IERS announcement comes out over 5 months >in advance and that the GPS operations fairly quickly enters it into the >system, you can with some good certainty know if you may have missed it >and is affected. I think you should read "off for a while" as "the 10

Re: [LEAPSECS] DCF 77

2010-12-24 Thread Poul-Henning Kamp
In message <51586ae7-0241-4330-85e4-022bb0d37...@pipe.nl>, Nero Imhard writes: > >On 2010-12-23, at 23:03, Poul-Henning Kamp wrote: > >> DCF77 reception in Denmark degrades enormously due to all the fireworks >> we loft. > >Euh... the signal is 77.5 KHz. Rather l

Re: [LEAPSECS] DCF 77

2010-12-23 Thread Poul-Henning Kamp
implement the leap second broadly? GPS does. DCF77's leapsecond bit is terrible, it only gives one hour of warning. This is the hour after midnight local time and on new-years eve DCF77 reception in Denmark degrades enormously due to all the fireworks we loft. -- Poul-Henning Kamp

Re: [LEAPSECS] POSIX and C (Was: Re: ISO Influence)

2010-12-22 Thread Poul-Henning Kamp
l time. > >You might want to rephrase that as a trivia question: WHERE under >U.S. jurisdiction is UTC (no offset) the legal, civil time? And the answer would have been, during the time where POSIX was a government requirement: In all the computers. Poul-Henning -- Poul-Hen

Re: [LEAPSECS] POSIX and C (Was: Re: ISO Influence)

2010-12-22 Thread Poul-Henning Kamp
In message <2010103603.gk3...@ucolick.org>, Steve Allen writes: >On Wed 2010-12-22T18:46:56 +0000, Poul-Henning Kamp hath writ: >> Broadcast time *IS* civil time, it is broadcast as a service to civilians. >> >> Take Germanys DCF77 as example: >> >> DCF7

Re: [LEAPSECS] POSIX and C (Was: Re: ISO Influence)

2010-12-22 Thread Poul-Henning Kamp
DCF77 does not transmit UTC, it transmits German summer or winter time, as indicated by one of the bits. It does not transmit the numeric difference between broadcast time and UTC nor for that matter DUT1. [2] Possibly 20, this is from memory. -- Poul-Henning Kamp | UNIX since Zilog Zeus

Re: [LEAPSECS] POSIX and C (Was: Re: ISO Influence)

2010-12-19 Thread Poul-Henning Kamp
In message <3de069eb-7182-4e5b-a462-90041cb26...@ucolick.org>, Steve Allen writ es: >On 2010 Dec 19, at 09:32, Poul-Henning Kamp wrote: >As it stands, as it is in use by various standards and systems, >UTC is irreparably broken. Discarding the name "UTC" for the >t

Re: [LEAPSECS] POSIX and C (Was: Re: ISO Influence)

2010-12-19 Thread Poul-Henning Kamp
In message <3436c6b7-34e7-425c-bf0a-632880351...@ucolick.org>, Steve Allen writ es: >On 2010 Dec 19, at 08:58, Poul-Henning Kamp wrote: >> Are you seriously suggesting that DCF77 and WWVB should not >> transmit the time people expect to see on their clocks ? > >Yes. &

Re: [LEAPSECS] POSIX and C (Was: Re: ISO Influence)

2010-12-19 Thread Poul-Henning Kamp
In message <60007541-eeb9-4802-9288-9d5af7ba0...@ucolick.org>, Steve Allen writ es: >On 2010 Dec 19, at 08:07, Poul-Henning Kamp wrote: >> Right, and you are advocating changing the POSIX standard, so ? > >The POSIX standard is broken, admittedly broken, by insisting that >

Re: [LEAPSECS] POSIX and C (Was: Re: ISO Influence)

2010-12-19 Thread Poul-Henning Kamp
In message , Rob Seaman writes: >On Dec 19, 2010, at 2:07 AM, Poul-Henning Kamp wrote: > >> Well, enourmous or not, we simply do not know, and Rob doesn't think >> it is so important to find them, that we should develop a time-estimate >> for how long time it wil

Re: [LEAPSECS] ISO Influence

2010-12-19 Thread Poul-Henning Kamp
the current POSIX hack can be distributed preconfigured in operating systems. Gerard writes: >Poul-Henning Kamp made some inquiries about how quickly Rob could review >code. I suggest this question misses a few important items. Actually it doesn't. Initially I simply wanted to esti

Re: [LEAPSECS] ISO Influence

2010-12-19 Thread Poul-Henning Kamp
support leap seconds, but they >would not experience any trouble with dropping the insertions of leap >seconds. Exactly. But these computers are just magically wished away by the astronomers. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP

Re: [LEAPSECS] POSIX and C (Was: Re: ISO Influence)

2010-12-19 Thread Poul-Henning Kamp
the standard to whatever you like, but I guess >few would comply. The xtime() functions have been here for most of a decade and few people know about them... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD s

Re: [LEAPSECS] ISO Influence

2010-12-18 Thread Poul-Henning Kamp
urce code can you review for leap-second sensitivity in an hour ? Poul-Henning -- 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 inco

Re: [LEAPSECS] ISO Influence

2010-12-18 Thread Poul-Henning Kamp
In message <89576419-9ca9-4fb3-83ff-05d958ce8...@noao.edu>, Rob Seaman writes: >I wrote: > >>> Then it should be straightforward to perform the inventory of >>> the different segments, systems, and software to demonstrate one >>> or the other of these

Re: [LEAPSECS] ISO Influence

2010-12-18 Thread Poul-Henning Kamp
review per hour ? -- 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. ___ LEAPSE

Re: [LEAPSECS] ISO Influence

2010-12-18 Thread Poul-Henning Kamp
In message <3b33e89c51d2de44be2f0c757c656c8809d66...@mail02.stk.com>, "Finklema n, Dave" writes: >ITU has UN funding. Actually, I'm not even sure to what degree that is the case. ITU charges fees for participation and their standards as well. Poul-Henning -- Poul-H

Re: [LEAPSECS] LEAPSECS Digest, Vol 48, Issue 15

2010-12-17 Thread Poul-Henning Kamp
ISO gets involved... Long live Parkinssons law... Poul-Henning -- 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.

Re: [LEAPSECS] A consolidated approach.

2010-12-13 Thread Poul-Henning Kamp
In message <20101213190904.ga1...@ucolick.org>, Steve Allen writes: >On Mon 2010-12-13T18:52:18 +0000, Poul-Henning Kamp hath writ: >> Actually, I'm pretty sure time is entirely independent of which >> way you orient the Earth. > >It is barely a decade during which

Re: [LEAPSECS] A consolidated approach.

2010-12-13 Thread Poul-Henning Kamp
ely use you quixotic quest as an example if he ever writes a follow-up. Poul-Henning -- 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

Re: [LEAPSECS] Leap Sec vs Y2K

2010-12-12 Thread Poul-Henning Kamp
ith DUT one, they will never win that argument. If Geophysicist announced leap seconds with at least 10 years firm notice, 90% of the problems they cause would be eliminated by the normal software update cycle. And now: Please shut your trap until you have taken time to find out what we are talki

Re: [LEAPSECS] Leap Sec vs Y2K

2010-12-12 Thread Poul-Henning Kamp
;You are trying to paint an illusion that all clocks in the world tick >over in unison. No, I'm trying to point out that you are an ignoranmus in this context with your "within some minutes is plenty" blanket statements. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...

Re: [LEAPSECS] Leap Sec vs Y2K

2010-12-12 Thread Poul-Henning Kamp
rutine use of a sextant. The windows have minimal upward view these days, to give better radiation protection for the crew. -- 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

Re: [LEAPSECS] Leap Sec vs Y2K

2010-12-12 Thread Poul-Henning Kamp
ed between client and server within the >local LAN. >3. syncronization does not need to absolutely represent real time. >4. leap seconds, or the absence thereof, make no difference You forgot: 5. Canibalism is a problem the Navy has mostly under control. -- Poul-Henning Kamp

Re: [LEAPSECS] Leap Sec vs Y2K

2010-12-12 Thread Poul-Henning Kamp
km. You have just confirmed my suspicion that you have not a wisper of a clue about what you are pontificating about. -- 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

Re: [LEAPSECS] Leap Sec vs Y2K

2010-12-11 Thread Poul-Henning Kamp
In message <1292109115.24926.42.ca...@localhost>, Paul Sheer writes: >On Sat, 2010-12-11 at 22:35 +0000, Poul-Henning Kamp wrote: >> But that does not allow us to ignore the servers which are >> synchronized and which need to be synchronized to work. > >I disagree

Re: [LEAPSECS] Leap Sec vs Y2K

2010-12-11 Thread Poul-Henning Kamp
ate syncronization. Ohh we do, we most certainly do. But that does not allow us to ignore the servers which are synchronized and which need to be synchronized to work. Poul-Henning PS: Your caps-lock seems to be flakey. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org

Re: [LEAPSECS] Leap Sec vs Y2K

2010-12-11 Thread Poul-Henning Kamp
n't affect >> service. > >I have a script that dumps the timestamps of each of a number of >servers where I work; this is a recent result: Why are you not running NTP properly ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since

Re: [LEAPSECS] Leap Sec vs Y2K

2010-12-10 Thread Poul-Henning Kamp
heard of NTP, but have zero clue about how to configure it correctly ? Makes sense... I pity your customers. Poul-Henning -- 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

Re: [LEAPSECS] Leap Sec vs Y2K

2010-12-10 Thread Poul-Henning Kamp
ity you have for this pronouncement ? -- 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. ___

Re: [LEAPSECS] Leap Sec vs Y2K

2010-12-10 Thread Poul-Henning Kamp
don't use them ever again :-) The crucial change in exactly the last 40 years, is that computers of all sizes are communicating and the applications we want them to run for us, very much need to know and agree what time it is. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Ze

Re: [LEAPSECS] php breaks if UTC has no leap seconds?

2010-12-10 Thread Poul-Henning Kamp
bly still in order. But I have to disappoint you, I don't think a random piece of PHP code will convince anybody anywhere... -- 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

Re: [LEAPSECS] A leap second proposal to consider -- LSEM

2010-11-03 Thread Poul-Henning Kamp
le with "universal" in it, depends on one particular lump of rotating rock. -- 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

Re: [LEAPSECS] Back to Basics

2010-11-03 Thread Poul-Henning Kamp
In message <3b33e89c51d2de44be2f0c757c656c88099aa...@mail02.stk.com>, "Finklema n, Dave" writes: >3. The ITU is constituted under the UN as a regulatory agency without >the force of law. Check the fine print... -- Poul-Henning Kamp | UNIX since Zilog Zeus

Re: [LEAPSECS] An example

2010-11-03 Thread Poul-Henning Kamp
In message <3290398649bcc00c9c5e57792582bc1e.squir...@mx.pipe.nl>, "Nero Imhard " writes: >Poul-Henning Kamp wrote: >But the ITU proposal is not only about getting rid of leap seconds. It >tries to do this in a way that punishes proper engineering attempts of >those

Re: [LEAPSECS] An example

2010-11-03 Thread Poul-Henning Kamp
nd. no ? If you look outta you window Daniel, you see dat nice red car ? Dat runs so fast nobbody needs any leap seconds and it can be all yours Daniel... Nahh, he's french, cars probably wouldn't work... :-) Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus

Re: [LEAPSECS] Parting the Red Sea

2010-11-03 Thread Poul-Henning Kamp
the mean synodic day. And leapseconds is the means to the end that DUT1 should be < 1s. What benefit does non-astronomers have from DUT1 < 1s ? None that I can see... None that you have documented ? Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org

Re: [LEAPSECS] A leap second proposal to consider -- LSEM

2010-11-03 Thread Poul-Henning Kamp
d. The only intrinsic benefit of your proposal, is that it will become possible to actually test the leap-second handling code in a regular project life-cycle. Either way: There's no getting around that just dropping leap seconds is a no-cost option for computers. Poul-Henning -- Poul-Henn

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
lling out of the sky because of them, and being involved in a number of ATC applications, that is not an empty joke for me. -- 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 t

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
erable PHK cannot >foresee. So far, astronomers have messed with our timekeeping at least once every 20 years for the last 200 years, so I do think we have the necessary agility to fix any problems before they become insurmountable. Poul-Henning -- Poul-Henning Kamp | UNIX sin

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
In message <20101103013706.ga9...@ucolick.org>, Steve Allen writes: >On Wed 2010-11-03T01:30:15 +0000, Poul-Henning Kamp hath writ: >> What is the benefit of leap-seconds to non-astronomers ? > >http://www.google.com/images?q=dennis+di+cicco+analemma&hl=en&client=safa

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
In message , Mark Calabretta writes: > >On Wed 2010/11/03 00:03:16 -0000, "Poul-Henning Kamp" wrote >in a message to: Leap Second Discussion List > >>Leap seconds carry no discernible benefit to non-astronomers so >>even if they were trivial to code correctly, t

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
In message <4cd0aeda.1010...@bsdimp.com>, Warner Losh writes: >I don't have any connection to the ITU-R. And I'm even more disconnected from ITU-R: My country is not even likely to vote once it comes in front of the general assembly... Poul-Henning -- Poul-Henning Kamp

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
unable to yet discern? Like ? Is this some sort of "If leap seconds have a benefit but notbody notices, do we care ?" kind of riddle ? Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
In message <536635d43949d1db19f5fa0ce101632e.squir...@mx.pipe.nl>, "Nero Imhard " writes: >Op 02-11-10 23:56, Poul-Henning Kamp schreef: > >> There very much is: With each passing day, the probability that the next >> leap second will kill somebody because of sl

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
time seeing what the big deal is... >But "somehow" is not what is on the table. Yes, it is "somehow", as in "POSIX is right, TF.460 will be adjusted to conform to POSIX". That's not the "somehow" you're rooting for, but it is a "some

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
7;t tell you a bound, any contemporary OS has a way to communicate those statistics if they are known (typically via Dave Mills' system call) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
ook at. -- 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. ___ LEAPSECS mail

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
er, and that they will have to be aligned to eachother somehow. Poul-Henning -- 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

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
In message <20101102202753.gc21...@ucolick.org>, Steve Allen writes: >On Tue 2010-11-02T20:22:29 +0000, Poul-Henning Kamp hath writ: >> It admits no such thing, and for all I know, and despite your >> complaints about the lack of an "essen" unit, that there is m

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
In message <20101102194805.gb21...@ucolick.org>, Steve Allen writes: >On Tue 2010-11-02T18:55:17 +0000, Poul-Henning Kamp hath writ: >The POSIX standard admits that its "seconds" are not all of the same >length, and for practical purposes that makes them "mean so

Re: [LEAPSECS] Degrees of Accommodating Time Based on Earth Rotation

2010-11-02 Thread Poul-Henning Kamp
In message <211ee304-6f59-40a1-837f-3f8359f68...@noao.edu>, Rob Seaman writes: >Poul-Henning Kamp wrote: >Except that your suggestion is that we can ignore the whole thing >because the wisdom of local governance will sort it all out with >kaleidoscopically shifting timezone po

Re: [LEAPSECS] Degrees of Accommodating Time Based on Earth Rotation

2010-11-02 Thread Poul-Henning Kamp
In message , Tony Fi nch writes: >On Tue, 2 Nov 2010, Poul-Henning Kamp wrote: >> >> I may be misremembering, I thought the longitude conference was in 1884 ? > >Yes, but by that time there had already been 40 years of railway time in >the UK. We officially switched to a

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
In message <20101102184333.gy21...@ucolick.org>, Steve Allen writes: >On Tue 2010-11-02T18:37:11 +0000, Poul-Henning Kamp hath writ: >The existing international agreement for the meaning >of "day" is "mean solar day". You mean "one of the existing...&

Re: [LEAPSECS] Degrees of Accommodating Time Based on Earth Rotation

2010-11-02 Thread Poul-Henning Kamp
In message , Tony Fi nch writes: >On Tue, 2 Nov 2010, Poul-Henning Kamp wrote: >> >> Finagle Subject to >> Factor Unit/Resolution politics since >> ---

Re: [LEAPSECS] An example

2010-11-02 Thread Poul-Henning Kamp
econds for convenience is similar. I am pretty sure that if you told a random sample of people that "some scientists belive that some days should be one second long or shorter than usual", they would compare that to the Pi=3 idea, not the other way around. -- Poul-Henning Kamp

Re: [LEAPSECS] Degrees of Accommodating Time Based on Earth Rotation

2010-11-02 Thread Poul-Henning Kamp
identical seconds. In that light, it seems awfully logical that we would want to nail the length of the days down also... -- 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

Re: [LEAPSECS] The good fight.

2010-10-26 Thread Poul-Henning Kamp
ou wouldn't by any chance have thought of adding some computer or telecoms people to that mix ? Nahhh, probably not necessary, what would computers, networks and leap seconds have to do with each other... Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org

Re: [LEAPSECS] Saint Crispin's Day

2010-10-25 Thread Poul-Henning Kamp
In message <2b4e4363-72b2-4361-a562-5eb8b9cd1...@noao.edu>, Rob Seaman writes: >Heretofore the "UT" in UTC has meant "Universal Time". Just like the 'U' in "UN" has meant "united" with little practical effect... -- Poul-Henni

Re: [LEAPSECS] Saint Crispin's Day

2010-10-25 Thread Poul-Henning Kamp
In message <8f87309b-663b-4ca8-ba8d-f45c41010...@noao.edu>, Rob Seaman writes: >On Oct 25, 2010, at 11:50 AM, Poul-Henning Kamp wrote: > >> How could it ever be considered good design to embed a politically >> controled timescale, subject to lots of valid scientific criti

Re: [LEAPSECS] Saint Crispin's Day

2010-10-25 Thread Poul-Henning Kamp
In message <09b6e6af-6426-4068-a4a8-f4ade644a...@noao.edu>, Rob Seaman writes: >On Oct 25, 2010, at 8:28 AM, Poul-Henning Kamp wrote: > >No. Diurnal rhythms are more pronounced than ever in human systems >and processes. Allowing these to drift is a poor engineering choice. Ye

Re: [LEAPSECS] UTC Redefinition Advanced

2010-10-25 Thread Poul-Henning Kamp
w it was the wrong timescale for your astronomical applications ? -- 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 ad

Re: [LEAPSECS] UTC Redefinition Advanced

2010-10-25 Thread Poul-Henning Kamp
remove spurious seconds to their timescale ? Or one which, given a precise enough frequency standard and knowledge about your relativistic whereabouts you can tell what time it is, without caring what a particular and erratic piece of rock does in another part of the cosmos ? Poul-Henning -- P

Re: [LEAPSECS] Cost: getting rid of GMT & discontinuing leap seconds

2010-10-25 Thread Poul-Henning Kamp
In message , Rob Seaman writes: >Poul-Henning Kamp wrote: > >> Why did astronomers use UTC as timescale in their systems, where UT1 should >> have been used? >Astronomers use both UTC and the general notion of UT. Sometimes >they use UT1. We use numerous other timescal

Re: [LEAPSECS] Cost: getting rid of GMT & discontinuing leap seconds

2010-10-24 Thread Poul-Henning Kamp
In message <4cc49881.23351.364d6...@dan.tobias.name>, "Daniel R. Tobias" writes : >On 24 Oct 2010 at 18:12, Poul-Henning Kamp wrote: > >> Medicine production is another case: In continuous production >> setups, all materials have to be traceable to with second

Re: [LEAPSECS] Cost: getting rid of GMT & discontinuing leap seconds

2010-10-24 Thread Poul-Henning Kamp
In message <481e7b03-abea-40a7-a8ef-b82e73c21...@noao.edu>, Rob Seaman writes: >On Oct 24, 2010, at 11:12 AM, Poul-Henning Kamp wrote: >And do either of these use cases have any connection to Earth >orientation? DUT1 and all other earth orientation parameters have absolutely no ap

Re: [LEAPSECS] Cost: getting rid of GMT & discontinuing leap seconds

2010-10-24 Thread Poul-Henning Kamp
l-Henning -- 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. ___ LEAPSEC

Re: [LEAPSECS] UTC Redefinition Advanced

2010-10-22 Thread Poul-Henning Kamp
ow I do consider your dire forecasts of economic ruin unsubstantiated handwaving... Or to put it more bluntly: You and what army ? Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-taho

Re: [LEAPSECS] UTC Redefinition Advanced

2010-10-22 Thread Poul-Henning Kamp
In message <56b60f42-f2dc-4ea5-88fd-2a0c2aa0a...@noao.edu>, Rob Seaman writes: >On Oct 22, 2010, at 11:08 AM, Poul-Henning Kamp wrote: >"Many millions of dollars" is certainly not hyperbole. [...] I called it handwaving, not hyperbole. -- Poul-Henning Kamp | UNIX

Re: [LEAPSECS] UTC Redefinition Advanced

2010-10-22 Thread Poul-Henning Kamp
t sound technical to me (Economy possibly ?) B) "Many millions of dollars" ? (Handwaving ?) -- 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

Re: [LEAPSECS] FW: comments on DRR TF.460-6

2010-09-28 Thread Poul-Henning Kamp
they electronic or antique. Poul-Henning -- 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. ___

Re: [LEAPSECS] remind NIST of Project GREAT

2010-09-28 Thread Poul-Henning Kamp
ouple of stairs rather than a mountain is relevant news :-) -- 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

Re: [LEAPSECS] comments on DRR TF.460-6

2010-09-21 Thread Poul-Henning Kamp
be in a much better position to make this argument, if the appropriate astronomical assembly would go in the record and state that Harrisson solved the longitude problem first and best :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 Free

Re: [LEAPSECS] why not ITU-T?

2010-09-06 Thread Poul-Henning Kamp
In message <20100906171714.ga27...@ucolick.org>, Steve Allen writes: >On Mon 2010-09-06T17:11:11 +0000, Poul-Henning Kamp hath writ: >As such it is long the case that time decisively belongs to >Dave Mills and the NTP crew. We in the NTP crew would love to own it, but I can gua

Re: [LEAPSECS] why not ITU-T?

2010-09-06 Thread Poul-Henning Kamp
should take time over from ITU-R because they are more recent ? Given that ITU-T is irrellevant and has been int since they did the OSI-protocols, I see no point... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | B

Re: [LEAPSECS] Coming of age in the solar system

2010-09-06 Thread Poul-Henning Kamp
It's anybodys guess if UK could care less. -- 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. _

Re: [LEAPSECS] Coming of age in the solar system

2010-09-05 Thread Poul-Henning Kamp
In message , Rob Seaman writes: >On Sep 5, 2010, at 8:00 AM, Poul-Henning Kamp wrote: >Oh! Other than astronomy - the one and only place we've looked >sufficiently well enough to know the answer. So far I don't recall one single example having been proffered outside astrono

Re: [LEAPSECS] Coming of age in the solar system

2010-09-05 Thread Poul-Henning Kamp
ystem on UTC time, rather than local time. 2. In civilized parts of the world, we know about these days 5+ years in advance. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe

Re: [LEAPSECS] Coming of age in the solar system

2010-09-05 Thread Poul-Henning Kamp
le draft of TF.460 suggesting that outcome? My personal estimate: No chance in hell, unless significant external pressure is applied. For all practical purposes POSIX/OpenGroup is a dead end, but it is the best dead end we have. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.2

Re: [LEAPSECS] Coming of age in the solar system

2010-09-05 Thread Poul-Henning Kamp
linded by science, but doesn't such a current >lack describe rather a massive business opportunity? The ultimate >source of all economic activity is entrepreneurial adaptation to >real world possibilities. Not as long as it is cheaper to fudge leap seconds some other way. -- Pou

Re: [LEAPSECS] Coming of age in the solar system

2010-09-05 Thread Poul-Henning Kamp
ITU temporal blitzkrieg, but rather were focusing on >building consensus for a coherently engineered system... I don't remember ever seeing even a hint of a plan for how you plan to get POSIX/OpenGroup standards updated and enforced. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20

Re: [LEAPSECS] Coming of age in the solar system

2010-09-05 Thread Poul-Henning Kamp
icular company, is that there is no economical way to test that a GPS based timing infrastructure handles leap-seconds correctly. -- 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 att

Re: [LEAPSECS] Coming of age in the solar system

2010-09-04 Thread Poul-Henning Kamp
has been relayed to me in confidence stays in confidence. Some of these organizations could get in stock-holder or regulatory trouble, if their "deficient operating practices" were disclosed. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956

Re: [LEAPSECS] Coming of age in the solar system

2010-09-04 Thread Poul-Henning Kamp
seconds. How many reports does that prevent from getting written ? We don't know, but we do know that managers are willing to do a lot of work to avoid even the risk of writing the reports.. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP

Re: [LEAPSECS] Coming of age in the solar system

2010-09-04 Thread Poul-Henning Kamp
7. That support would remember it. None of which are supported by your narrative. In my experience, the effects of leap seconds seldom if ever get beyond the first three filters, because leap seconds are "shit that just happens, and there is nothing we can do about it." Poul

Re: [LEAPSECS] Coming of age in the solar system

2010-09-04 Thread Poul-Henning Kamp
orry about leap >seconds have long since worked around the problem. You should really read the archives, before you say something as stupid as that. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tah

Re: [LEAPSECS] Coming of age in the solar system

2010-09-04 Thread Poul-Henning Kamp
ay to peoples telephones, internet connections, flight safety, medicine production and so on. Civil time these days would be more correctly called "ornamental time", because it starts at the VCR, fridge, oven, grandfather clock and other off-line time displays. Poul-Henning -- Poul-Henni

Re: [LEAPSECS] LEAPSECS Digest, Vol 45, Issue 1

2010-09-03 Thread Poul-Henning Kamp
1752 ? Poul-Henning -- 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.

Re: [LEAPSECS] LEAPSECS Digest, Vol 45, Issue 3

2010-09-02 Thread Poul-Henning Kamp
In message <25804530-dbba-4aad-b6d9-441b59dcf...@noao.edu>, Rob Seaman writes: >Poul-Henning Kamp wrote: >When telescopes are outlawed, only outlaws will have telescopes. Totally off-topic, but to good to not share: When marriage is outlawed, only outlaws will have inlaws. --

Re: [LEAPSECS] LEAPSECS Digest, Vol 45, Issue 3

2010-09-02 Thread Poul-Henning Kamp
inition would be >illegal. Unless of course, if the nature of the change was to make the presently non-compliant, and therefore presumably illegal, systems compliant and thus legal :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD com

Re: [LEAPSECS] LEAPSECS Digest, Vol 45, Issue 1

2010-09-02 Thread Poul-Henning Kamp
In message , Rob Seaman writes: >Poul-Henning Kamp wrote: > >> ITU-T has UTC written into the standards for cross-TelCo billing >> interfaces/protocols. > >So it's literally true: > > Money makes the world go round Ohh, you bet. Don't remember tha

Re: [LEAPSECS] LEAPSECS Digest, Vol 45, Issue 1

2010-09-02 Thread Poul-Henning Kamp
at's attained the force of law >through repetitive use [...] Don't disregard ITU totally here. ITU-T has UTC written into the standards for cross-TelCo billing interfaces/protocols. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 Fr

Re: [LEAPSECS] LEAPSECS Digest, Vol 45, Issue 1

2010-09-02 Thread Poul-Henning Kamp
nment does not have a position (Ie: pretty much anything other than frequency allocations). -- 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 w

Re: [LEAPSECS] h2g2

2010-09-01 Thread Poul-Henning Kamp
th cases). I can tell you exactly why: Nobody but scottish farmers have ever raised the position of the sun in the sky, relative to the hands on the clock, as an argument with respect to timezones in EU. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP sinc

Re: [LEAPSECS] h2g2

2010-09-01 Thread Poul-Henning Kamp
UK and Portugal in >WET, rather than the UK shifting the other way. One of the major objectives of EU is to make trade easier and that is why they want as few timezones as possible, ideally only one. That is the logic applied, earths orbit has very little, if anything, to do with it. -- Po

Re: [LEAPSECS] h2g2

2010-08-27 Thread Poul-Henning Kamp
In message <20100827164948.ga13...@ucolick.org>, Steve Allen writes: >Nothing is safe from redefinition. Tell that to the inumerable rulers who have fixed european borders one final time after the other. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org

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