roy@alanine.phri.nyu.edu (Roy Smith) (12/18/89)
This has nothing directly to do with tcp-ip, but I know a lot of time
freaks hang out here. If you care about keeping accurate time, in particular
the history of said endevour, you will probably want to get your hands on the
following interesting little book I found in the library today:
%T Sky with ocean joined: Proceedings of the sesquicentennial symposia of
the U.S. Naval Observatory, December 5 and 8, 1980.
%E Steven J. Dick
%E LeRoy E. Doggett
%I U.S. Naval Observatory
%C Washington, D.C.
%D 1983
No, they don't discuss NTP, but they do talk about earlier ventures
in that direction such as Western Union clocks (discussed at length on the
telecomm digest in the past) and time balls, as well as more modern devices
such as atomic clocks.
--
Roy Smith, Public Health Research Institute
455 First Avenue, New York, NY 10016
roy@alanine.phri.nyu.edu -OR- {att,philabs,cmcl2,rutgers,hombre}!phri!roy
"My karma ran over my dogma"Mills@UDEL.EDU (12/21/89)
Roy, The entertainment is fun. To balance the citations from a technical standpoint, you guys might want the following on your bookshelf: Blair, B.E. (Ed.). TIme and Frequency Theory and Fundamentals. National Bureau of Standards Monograph 140, U.S. Department of Commerce, 1974. While somewhat dated in some respects, this tome may be the single most usful reference for mathematical theory, practical generation and distribution and description of timescales. Dave
Nagle@cup.portal.com (John - Nagle) (12/22/89)
We have a leap second coming up at the end of the year, and sites running tightly coupled clock systems may notice the transient. Dave Mills will probably report on this at some point. John Nagle
Mills@UDEL.EDU (12/25/89)
John, Well, we are having a wonderful time on the Network Time Protocol jabber list (ntp@trantor.umd.edu) exploring the causes, effects and defenses of leap seconds, all fifteen of them come next year. For a mind-numbing expose of timescales, leaps and wiggles as relevant to a computer clock near you, see the file pub/ntp/leap.txt on louie.udel.edu. For those clocks chiming NTP, something over 2000 so far, be advised the primary NTP servers should leap precisely on cue; however, what your time-conversion routines do during second 23:59:60 UT on 31 December 1989 may be anybody's guess. The more extreme of us clockerfolk have a contest going. Dave