[time-nuts] Pulsar Source?

[Tom Knox]

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: paulswedb at gmail.com
> To: jfor at quikus.com; time-nuts at febo.com
> 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 <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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