[time-nuts] Pulsar Source?

paul swed paulswedb at gmail.com
Wed Mar 28 20:09:59 UTC 2012


I have enough trouble with wwvb :-)
Going to skip this project

On Wed, Mar 28, 2012 at 4:02 PM, J. Forster <jfor at quikus.com> 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 <n1hac at Alum.Dartmouth.ORG>
> > To: Discussion of precise time and frequency measurement
> > <time-nuts at febo.com>
> > 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
> >>
> >>
> >>
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>
>
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