Brooke Clarke wrote: > Hi Tom: > > Thanks for the lab test report on the earth frequency standard. Since > there are a number of frequency/time standards that have much better > performance I'd like to find a way to directly measure the performance > of the earth standard. I've thought about a telescope looking at stars > or maybe a photo detector to look at the light from the closest star to > the earth frequency standard. Do you have any ideas on how to make > these measurements? > > Have Fun, > > Brooke Clarke > > w/Java http://www.PRC68.com > w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml > http://www.precisionclock.com > > > > Tom Van Baak wrote: > > >>>> Anyway, how do you compute the Allan Deviation of a sun dial? >>>> >>>> >>>> >>> Oh, God, now someone's going to do it... >>> >>> John >>> >>> >>> >> Well, yes, thanks for asking! I did it a year ago. >> >> The lab report on earth, including Allan deviation is at: >> >> http://www.leapsecond.com/museum/earth/ >> >> /tvb >> >> >> >> > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > The conventional solution is either a meridian transit instrument or a zenith tube, either of which is much easier and cheaper to construct than an accurately rotating platform.
Bruce _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts