[LEAPSECS] the big artillery

michael.deckers michael.deckers at yahoo.com
Mon Nov 3 02:43:00 EST 2014

   On 2014-10-31 17:39, Brooks Harris wrote:

> Yes. Its primary timescale, sometimes called "PTP Time", more properly the "PTP
> Timescale", is a "TAI-like" counter (uninterrupted incrementing count of
> seconds). Note its origin, or epoch, is 1969-12-31T23:59:50Z, ten seconds before
> the POSIX "the Epoch" (if you take that to mean two years (2 x 365 x 86400)
> seconds before 1972-01-01T00:00:00Z (UTC), as NTP does).

   Just nitpicking:
   In [IEC 61588 of 2009-02. section 7.2.2] we read:
     "The PTP epoch is 1 January 1970 00:00:00 TAI,
      which is 31 December 1969 23:59:51.999918 UTC."
   So you are off by about 2 s.

   Michael Deckers.

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