That cuts to the heart of my question, are starquakes common to all pulsars? It seem long ago Pulsars were discounted as a viable terrestrial freq standard. But my thought was doing this in space away from the noise and atmospheric concerns on earth.
Thomas Knox > Date: Wed, 28 Mar 2012 16:09:59 -0400 > From: [email protected] > To: [email protected]; [email protected] > Subject: Re: [time-nuts] Pulsar Source? > > I have enough trouble with wwvb :-) > Going to skip this project > > On Wed, Mar 28, 2012 at 4:02 PM, J. Forster <[email protected]> wrote: > > > Pulsars use for high accuracy timing was discarded in about the > > 1960s-1970s. There are sudden pulsar rate changes, related to starquakes > > as I remember. Counselman et al did the expeeriment. > > > > Also, there are very few microwave photons per pulse. It takes a lot of > > correlation to get anything, even with as big a dish as Aricebo. > > > > -John > > > > ============ > > > > > > > > > If I recall correctly, > > > > > > In one of my trips to the NRAO in Greenbank, WV they were, at one time, > > > using a > > > dedicated 60ft dish to track a pulsar to compare it against their local > > > H-Maser. > > > (It was interesting to see the Maser as it looked like a "homebrew" > > > version. I > > > saw no manufacturer's name on it.) > > > > > > It would come down to what value of S/N do you want or need to make your > > > own > > > measurment. > > > > > > -Brian, WA1ZMS > > > > > > > > > > > > > > > ----- Original Message ---- > > > From: David McGaw <[email protected]> > > > To: Discussion of precise time and frequency measurement > > > <[email protected]> > > > Sent: Wed, March 28, 2012 3:16:03 PM > > > Subject: Re: [time-nuts] Pulsar Source? > > > > > > What would it take (how big a dish) to receive a pulsar directly, such > > > as the millisecond one in the Crab Nebula? DBTV, TVRO? > > > > > > David > > > > > > On 3/28/12 2:29 PM, Tom Knox wrote: > > >> If pulsars are natures best clocks, I wonder how practical it would be > > >> to use > > >>satellites to receive and rebroadcast a highly accurate timing signal > > >> based on > > >>their signals? > > >> > > >> Thomas Knox > > >> > > >> > > >> > > >> _______________________________________________ > > >> 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. > > > > > > > > > _______________________________________________ > > > 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. > > > _______________________________________________ > 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.
