>Hey Jerry, Ron and all.
>
>I think what you mean is time dilation.
>It's a phenomenon where time in a fast moving object (e.g. a spacecraft) or
>a strong gravitational force (like a black hole) goes
>slower than somewhere else. It can only be measured at high speeds, close
to
>
>the speed of light or near the event horizon of a black hole. Time is
>'stretched out'
>and when the clock (inside the capsule) reaches the speed of light or the
>inner border
>of the event horizon it even stops. When the clock is compared to one
>on earth, time has run more slowly in space.
>
>I don't recall any spaceprograms where such research has been done.
>
>Cheers,
>Tim
>
>
>Jerry W. Decker wrote:
>
>> Hi Ron et al!
>>
>> You wrote;
>> > A quick question. My uncle tells me that one of the early space
>> > programs rockets had a clock on board and an identical clock that
>> > remained on the Earth. When the capsule returned, the clocks were
>> > off. Did they actually do this? Thanks for your time (no pun)
>> > Ron Nakano - rmm@mako.com
>>
>> I don't know about that specific experiment, though I hear the use of
>> atomic clocks, using the oscillations from a cesium atom I believe tend
>> to show anomalies from planes flying high in the atmosphere and clocks
>> on the planet.
>>
>> I couldn't find anything on the web that specifically states such an
>> anomalous response, so treat it as hearsay..the folks to ask would be
>> NASA direct.
>>
>> I did a search and found this on atomic clocks (but I'm pretty sure
>> cesium is also used, could be any atom really);
>>
>> How atomic clocks work;
>>
>> http://www.iao.com/howthing/atomihtw.htm
>>
>> ======================
>> A good document about why atomic clocks are necessary and indicating no
>> variations from earth orbit to earth;
>>
>> http://www.nextstep.com/stepback/cycle10/123/atomic.html
>>
>> ======================
>> Your computer time versus atomic clock time;
>>
>> http://www.tomjaffe.com/clockb.htm
>>
>> A much superior comparison page;
>>
>> http://www.rickmandata.com/time/cst.htm?
>>
>> ======================
>> The atomic clock as a phase stable oscillator for DEEP SPACE
>> COMMUNICATION;
>>
>> http://bul.eecs.umich.edu/uffc/fc_abstracts/abstract7-15-156.html
>>
>> ======================
>> Atomic clock in space to reach new heights of accuracy (cesium);
>>
>> http://www.af.mil/news/Jan1998/n19980120_980077.html
>>
>> The projected accuracy of the space clock will be at least 10 times
>> better than the best Earth-based clocks. The accuracy of Earth-bound
>> cesium atomic clocks is limited by the length of time each cesium atom
>> can be observed -- on Earth; gravity quickly removes the atoms from the
>> observation region. In the microgravity environment of space, each atom
>> can be observed for many seconds. The space clock will enable
>> researchers to make gravitational red-shift measurements, test whether
>> the speed of light is truly the same in all directions, and do other
>> relativity experiments.
>> ======================
>> Fascninating page on radiation and space induced equipment anomalies;
>>
>> http://envnet.gsfc.nasa.gov/Papers/JPRadiation.html
>>
>> Single-event upset rates in complex devices such as microprocessors, or
>> latchups or burnouts in any device, cannot be reliably predicted.
>> Educated guesses based on accelerator observations and study of the
>> flight performance of similar devices is a common procedure.
>>
>> Galactic cosmic rays can also generate background noise in star sensors,
>> infrared detectors, and charge coupled devices. In addition to noise,
>> these rays can masquerade as real signals which may affect subsystems.
>>
>> Nichols [6] ranks the hardness of current technologies as shown in Table
>> 1. He also notes that P-Type Metal-Oxide Silicon (PMOS) is susceptible
>> to SEUs. In all of these devices depositing charge at a certain point in
>> the circuit is equivalent to changing the voltage at the point.
>> ======================
>> You might send an inquiry about this rocket/clock anomaly claim to
>> NASA's home page;
>>
>> http://www.nasa.gov/
>>
>> and here is how to contact them (maybe they'll answer..<g>..);
>>
>> http://www.nasa.gov/hqpao/comments.html
>>
>> or the Jet Propulsion Laboratory;
>>
>> http://jpl.nasa.gov/
>>
>> --
>> Jerry Wayne Decker / jdecker@keelynet.com
>> http://keelynet.com / "From an Art to a Science"
>> Voice : (214) 324-8741 / FAX : (214) 324-3501
>> KeelyNet - PO BOX 870716 - Mesquite - Republic of Texas - 75187
>>
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