[time-nuts] Pulsars make a GPS for the cosmos

Magnus Danielson magnus at rubidium.dyndns.org
Sun Sep 29 09:23:15 EDT 2013


On 09/29/2013 03:11 PM, Jim Lux wrote:
> On 9/29/13 3:42 AM, mc235960 wrote:
>>
>> Le 28 sept. 2013 à 14:26, Magnus Danielson a écrit :
>>
>>
>>    I think the radio elescope(s) needed are much smaller. There are
>> apparently 2 pulsar clocks installed here in europe, one in St
>> Catherine's church Gdansk and the other in the European Parliament,
>> Brussels. The Wiki article states "The pulsar clock consists of a
>> radiotelescope with 16 antennas, which receive signals from six
>> designated pulsars. Digital processing of the pulsar signals is done
>> by an FPGA device" . I have tried to find more details without
>> success, but the antennas must be reasonable sized to be installed in
>> such places. I think the OP link indicates that X-ray wavelengths
>> would be used which bring down the detector size. No use on earth
>> though.
>>
>
> It would be interesting to find out more info.
>
> Xrays are nice (see X-NAV), but so far, nobody has built a small,
> lightweight X-ray detector of sufficient efficiency.  You don't want
> to have multiple detectors the size of Chandra, XMM, or Nustar
They will be great devised to show where the money went. :)

Cheers,
Magnus


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