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

[Tom Knox]

Actually Dr Kent Irwin at NIST has developed very small and extremely sensitive detectors using SQUIDs. 
Not exactly a project that can be duplicated at home though. There are a number of articles about his work on line.

Thomas Knox



> Date: Sun, 29 Sep 2013 06:11:38 -0700
> From: jimlux at earthlink.net
> To: time-nuts at febo.com
> Subject: Re: [time-nuts] Pulsars make a GPS for the cosmos
> 
> 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
> 
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