Thank you, Warner, for your thoughtful reply enumerating the reasons that you are in camp #2. It caused me to research the matter further, so that I could understand your point of view.
I purchased a copy of the IEEE 1588 standard and began to study it. Referring to IEEE 1588 (= IEC 61588) and a table on the IERS Web site, I was able to prepare a table summarizing the behaviour of the UTC, TAI, GPS, NTP, and PTP time scales, espeically at times at or near a leap second. I've attached that table as a *.PDF file. Would you be kind enough to review it, to see if I've got it right? -- James Maynard Salem, Oregon, USA
