Hi Thanks for the quick response.
The impression I've always had of that system is that it is comparing the sources two at a time. They can select between a number of sources, but only one pair is looked at. I'm after stuff on a system that simultaneously looks at several sources. My assumption is that you could simply use a bunch of DMTD's and then do the math. You might also be able to simplify things a bit.... Bob -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bruce Griffiths Sent: Wednesday, February 17, 2010 3:57 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] DMTD to MMTD Bob Camp wrote: > Hi > > > > DMTD looks at a pair of sources (crystal, rubidium, maser .) and tells you > the difference between them. If you looked at more than two, you can better > characterize the individual sources. > > > > Any good papers out there on taking the DMTD approach and extending it to > simultaneous observation of a number (like 3 or 5) of oscillators? I'm sure > I've missed at least one .. > > > > Bob > > Bob JPL have had such systems for many years: http://tmo.jpl.nasa.gov/progress_report/42-169/169B.pdf <edit to fix link> http://tmo.jpl.nasa.gov/progress_report/42-169/169B.pdf http://tycho.usno.navy.mil/ptti/1994/Vol%2026_25.pdf Bruce _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
