Joe Gwinn joegwinn at comcast.net
Sun Oct 11 21:09:44 EDT 2009

At 1:02 PM -0700 10/11/09, Steve Allen wrote:

>On 2009 Oct 11, at 12:43, Joe Gwinn wrote:

>>Here is my posting to the POSIX Committee (and Austin Group) on the

>>requirements, summarizing debate up till then:





>One other practical requirement exists as a result of currently

>deployed solutions.


>The value of time_t must have a simple correspondence to one

>of the existing broadcast time scales. For most ensembles of

>systems that time scale has to be whatever time scale is specified

>by the ITU-R, but as we have read, some ensembles of systems

>do choose GPS time.

I would phrase it slightly differently, that the new timescale must
either be, or be easily derivable, from a widely disseminated
timescale. In practice, one's choices are UTC and GPS System Time.

Joe Gwinn

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