atomic clock history

2004-01-01 Thread Steve Allen
I've just run into a website with some autobiographical material by Essen which covers the developments that originally brought leap seconds into being: http://www.btinternet.com/~time.lord/index.html -- Steve Allen UCO/Lick Observatory Santa Cruz, CA 95064 [EMAIL PROTECTED]

Re: trading time

2004-01-01 Thread Tom Van Baak
Or put it another way, can you think of a single application where GPS cannot already deliver the same TAI as Galileo will someday deliver? Golly, Tom, it's on your own web page http://www.leapsecond.com/pages/saoff/ At the whim of the commander in chief, GPS can turn on Selective

Re: GPS will fail EVEN SOONER

2004-01-01 Thread Tom Van Baak
The W1K rollover for GPS was in 1999, and all that year was spent testing various systems to see how they would fail. It would not be at all surprising if the impending doom of the leap second counter was noticed during a review of other deficiencies in the GPS system. Please see: Some

Re: GPS will fail EVEN SOONER

2004-01-01 Thread Steve Allen
On Thu 2004-01-01T15:48:01 -0800, Tom Van Baak hath writ: Some historical notes on the GPS Week Number Rollover http://www.leapsecond.com/notes/gpswnro.htm I think the LEAPSECS group will find the part about the GPS leap second patent quite interesting! Wow. I can barely imagine being

Re: GPS will fail EVEN SOONER

2004-01-01 Thread Steve Allen
On Thu 2004-01-01T15:48:01 -0800, Tom Van Baak hath writ: Some historical notes on the GPS Week Number Rollover http://www.leapsecond.com/notes/gpswnro.htm I think the LEAPSECS group will find the part about the GPS leap second patent quite interesting! So here is an obvious exercise for the

Discovery Channel article

2004-01-01 Thread Tom Van Baak
Must be a slow news year; here's another one... http://dsc.discovery.com/news/briefs/20031229/atomicclock.html At least this article is a lot more accurate than CNN's and a rare popular article that correctly distinguishes between rate and deceleration (it mentions 1.5 milliseconds per century):