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 BIH atomic time scale which later became TAI. Appendix B of the 2002 standard indicates unclearly that the PTP time scale is TAI - 10 s (equivalent to the LORAN-C time scale, the "right" zoneinfo time scale, and the canonical IBM z/OS time scale). The 2008 standard seems to correct the confusion largely by omitting most of the self-contradictory content of the original Appendix B. Nevertheless, there are several references to PTP which repeat the content of the original and say that PTP is TAI - 10 s. Is there any clear explanation of what happened? -- Steve Allen <[email protected]> WGS-84 (GPS) UCO/Lick Observatory--ISB Natural Sciences II, Room 165 Lat +36.99855 1156 High Street Voice: +1 831 459 3046 Lng -122.06015 Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m _______________________________________________ LEAPSECS mailing list [email protected] http://six.pairlist.net/mailman/listinfo/leapsecs
