Hi
Is there a “common view” to a TV station or an FM radio station or a cell tower or …. Carrier phase works on terrestrial signals. If you have one with a stable enough career and a complex enough modulation to work out which cycle is which, it might be a cheaper approach. Bob > On Apr 11, 2016, at 1:00 AM, Bruce Griffiths <[email protected]> > wrote: > > There is a proposal to use multiple light bucket style optical telescopes to > do Intensity stellar Interferometry over short baselines (up to perhaps 1km > or so) by using independent clocks to time tag photon arrivals. store the > time tags and process the data off line. Depending on the time tag resolution > there is a need to measure the time differences between the independent > clocks to an accuracy in the 1ns to 100ps range. Is there a better way of > doing this other than using geodetic grade GPS receivers capable of GPS > carrier phase measurements?Since the local clock flywheel oscillators will > need to not deviate by more than 100ps or so over the several minutes > required to perform the carrier phase averaging what sort of clock will be > suitable apart from a good rubidium standard with a cleanup oscillator? > NB Running fibres or coax between the telescopes isnt an option. > > The relative positions of the telescopes has to be known to within a cm or so > for this to work. > Bruce > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
