I don't know about pulsars other than The Crab. If you are contemplating using a pulsar, you also have a load of orbital mechanics corrections to consider. It is highly unlikely the pulsar is not moving with respect to the earth, in several prettx complex ways.
-John ================ > 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. > > _______________________________________________ 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.
