Re: Frage zur speziellen Relativitaetstheorie

Am Thu, 02 Feb 2006 17:45:59 +0100 schrieb Andreas Most:

Hier wird es erwähnt:
http://www.johnstonsarchive.net/relativity/einstein2.html

Naja, auch hier wird nur über Gerüchte berichtet:
"When the first prototype GPS satellite with an atomic clock was launched
in 1977, reportedly some involved still doubted that the relativistic
effects were real. The satellite carried a component that could be switched
on to correct the signal if the satellite's clock proved to be affected by
relativity. It did, measuring time at a rate almost one part in two billion
faster than clocks on the ground."

Wenn's den Schalter wirklich gab, dann würde mich brennend interessieren,
mit welcher Ausgangsstellung das GPS in Betrieb genommen wurde :-)

und hier ein Übersichtsartikel
http://relativity.livingreviews.org/open?pubNo=lrr-2003-1
in dem in Abschnitt 5
http://relativity.livingreviews.org/open?pubNo=lrr-2003-1&page=node5.html
sogar eine Referenz angegeben wird. Wahrscheinlich wirst Du dort fündig.

"There is an interesting story about this frequency offset. At the time of
launch of the NTS-2 satellite (23 June 1977), which contained the first
Cesium atomic clock to be placed in orbit, it was recognized that orbiting
clocks would require a relativistic correction, but there was uncertainty
as to its magnitude as well as its sign. Indeed, there were some who
doubted that relativistic effects were truths that would need to be
incorporated."

Als Refernz wird genannt:
Alley, C., ``Proper time experiments in gravitational fields with atomic
clocks, aircraft, and laser light pulses'', in Meystre, P., and Scully, M.
O., eds., Quantum Optics, Experimental Gravity, and Measurement Theory,
Proc. NATO Advanced Study Institute on Quantum Optics and Experimental
General Relativity, August 1981, Bad Windsheim, Germany, 363, (Plenum
Press, New York, 1983).

Jetzt müssten wir nur noch diese Referenz zur Hand haben, um zu prüfen, ob
das auch dort wieder nur vom Hörensagen weiter gereicht wurde ...

Tom Berger

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