[LEAPSECS] POSIX Time

[Joe Gwinn]

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:

>>

>><http://www.opengroup.org/austin/mailarchives/austin-group-l/msg02131.html>

>

>

>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