Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror

Comment: here is the draft set of possible options (Score 4, Informative) 289

by at10u8 (#48748059) Attached to: Extra Leap Second To Be Added To Clocks On June 30
A recent draft of the set of options which will be presented when the World Radio Conference votes this fall is visible at http://acma.gov.au/Industry/Sp... This draft has options A, B, and C, but it is likely to be wordsmithed a lot before it is finished.

Comment: Re:TAI (Score 1) 68

by at10u8 (#44906389) Attached to: Next Chapter In the Leap Second Story
Yes "right" is "agree with everyone else", but in the existing documents by which various international agencies approved the use of UTC all of them did so along with an assertion that everyone was agreeing with "mean solar time"; i.e., that days are counted by measuring the rotation of the earth. Those engineers who are free to ignore regulations and statutes can choose to use something like GPS time, but many projects and systems are constrained to conform to existing regulations and do not have that liberty. Any project or system which is constrained to use both UTC and POSIX is SOL every time a leap second happens.
This international regulatory process has repeatedly failed to engage all the stakeholders in an open discussion of what everyone expects and needs. The result of that has been "failure of imagination" when one agency embarks on a course that differs from the existing agreements.

Comment: Re:Double time (Score 1) 68

by at10u8 (#44902323) Attached to: Next Chapter In the Leap Second Story
Look deeper at one of the underlying problems in this issue -- see blockquote in the "UTC in 1982" entry here. That paragraph was written by one of the folks who actually worked in the field of timekeeping, and those are the folks who produced the documents that get approved by the votes. (All the votes by those agencies that make the official documents are done by delegates who know next to nothing about the subject matter.) See how that 1982 paragraph crows about the way that UTC with leap seconds has solved all problems and become accepted by everyone. They were oblivious to the problems that would crop up. The process of making the decisions and producing these international recommendations has not changed much in the subsequent 30 years.

Comment: Re:I always thought leap seconds were stupid (Score 3, Interesting) 230

by at10u8 (#40512837) Attached to: Leap Second Bug Causes Crashes
except that BIPM, the providers of TAI, have published this http://www.bipm.org/cc/CCTF/Allowed/18/CCTF_09-27_note_on_UTC-ITU-R.pdf wherein the CCTF "stresses that TAI is the uniform time scale underlying UTC, and that it should not be considered as an alternative time reference." This appears to indicate that the CCTF and BIPM are not comfortable with the notion that operational systems might be employing TAI as their time scale. At the end of that paper they also discuss the possibility that TAI could cease to exist.

An inclined plane is a slope up. -- Willard Espy, "An Almanac of Words at Play"

Working...