Re: [LEAPSECS] "old UTC" and "new UTC"

2012-03-26 Thread Rob Seaman
Warner Losh wrote: > Rob Seaman wrote: >> Time, on the other hand, is a complex concept of diverse meanings. It will >> come as no surprise that I regard civil timekeeping as most closely allied >> with its meaning as an angular reference. > > The close alignment is due to the historical defin

Re: [LEAPSECS] "old UTC" and "new UTC"

2012-03-26 Thread Tony Finch
Rob Seaman wrote: > > Perhaps the main point between us. The proposed revision to ITU-R > 460-6, however, is a fumble-fingered attempt to pretend those two very > different time scales are the same thing. I would place that blame on UTC. Tony. -- f.anthony.n.finchhttp://dotat.at/ Thames, D

[LEAPSECS] temporal confusion

2012-03-26 Thread Steve Allen
A close reading of IEEE 1588-2002 and IEEE 1588-2008 (the PTP standard) seems to indicate some confusion. The normative text of both 2002 and 2008 seems pretty clear that the PTP time scale is supposed to match the number of seconds of TAI elapsed since 1970-01-01T00:00:00 in proleptic TAI, the BI