[time-nuts] HP 523B frequency counter & Sputnik

Brooke Clarke brooke at pacific.net
Thu Oct 4 16:08:09 EDT 2007


Hi Tom:
Hi Tom:

Is this a typo on the Ashby-Relativity.htm web page?

"At present one cannot easily perform tests of relativity with the system 
because the SV clocks are actively steered to be within 1 microsecond of 
Universal Coordinated Time (USNO)."

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.precisionclock.com
http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam


Tom Van Baak wrote:
> ); SAEximRunCond expanded to false
> Errors-To: time-nuts-bounces+brooke=pacific.net at febo.com RETRY
> 
> 
>>Tom Van Baak wrote:
>>
>>>A little known piece of Sputnik history...
>>>     http://www.hparchive.com/Journals/HPJ-1957-09-Sputnik.pdf
> 
> 
> Brooke Clarke wrote:
> 
>>I think it's more than fair to say sputnik is the grandfather of GPS.
> 
> 
> Yeah, my first thought when I ran across that HPJ article was,
> wow, even the first satellite had -- an oscillator! The other thing
> to note is that the combination of Sputnik and Dr. Peterson (at
> Stanford) were the "space segment" and "user segment"; two
> phrases familiar to anyone reading introductions to GPS. No
> "control segment", however.
> 
> If 40-year old Sputnik (quartz in space) is the grandfather, is
> 30-year old NTS-2 (cesium in space) the father of GPS? See:
> 
> http://www.leapsecond.com/history/Ashby-Relativity.htm
> 
> /tvb
> 
> 
> 
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