[time-nuts] Pulsar Source?

[J. Forster]

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: 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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