[time-nuts] Pulsar Source?

[J. Forster]

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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