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Anomalies in spacecraft velocities
As old as Voyage...
post Feb 29 2008, 07:06 PM
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Very interesting story on SPACE.com regarding currently unexplained anomalies in the velocities of spacecraft after their Earth flybys.

http://www.space.com/scienceastronomy/0802...ft-anomaly.html

Perhaps the twisting of spacetime induced by Earth's rotation could be gently altering the spacecraft's velocity.

http://www.voanews.com/english/archive/200...FTOKEN=51791561

In any case its pretty cool to have an unexplained force meddling with our best laid plans.



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It's a funny old world - A man's lucky if he gets out of it alive. - W.C. Fields.
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centsworth_II
post Feb 29 2008, 08:00 PM
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According to one of Emily Lakdawalla's Planetary Society Blog entries,
at least some relativistic effects are already accounted for in spaceflight.

Accounting for general relativity at Mercury
"It turns out that general relativity is routinely accounted for in
spacecraft navigation.... the NASA navigation software developed
at JPL....incorporates the Ted Moyer formulations for navigation
which includes mathematical expressions that describe the effects
of general relativity."
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Posts in this topic
- As old as Voyager   Anomalies in spacecraft velocities   Feb 29 2008, 07:06 PM
- - nprev   Mmm...don't forget that the gravitational cons...   Feb 29 2008, 07:57 PM
|- - Floyd   QUOTE (nprev @ Feb 29 2008, 02:57 PM) ......   Mar 1 2008, 10:31 PM
|- - Greg Hullender   QUOTE (Floyd @ Mar 1 2008, 02:31 PM) The ...   Mar 2 2008, 04:41 AM
- - centsworth_II   According to one of Emily Lakdawalla's Planet...   Feb 29 2008, 08:00 PM
|- - scalbers   QUOTE (centsworth_II @ Feb 29 2008, 08:00...   Mar 2 2008, 04:56 PM
- - nprev   That's pretty much a validation of how far dow...   Feb 29 2008, 08:29 PM
- - mchan   Emily's article describes comparison between p...   Mar 1 2008, 06:21 AM
- - nprev   Wow, did I ever overestimate!!! Same p...   Mar 1 2008, 06:58 AM
- - remcook   "The researchers looked at six deep-space pro...   Mar 1 2008, 03:54 PM
|- - Greg Hullender   QUOTE (remcook @ Mar 1 2008, 07:54 AM) ...   Mar 1 2008, 07:01 PM
- - nprev   The author obviously meant the Voyagers...but the ...   Mar 1 2008, 05:50 PM
- - edstrick   There is a sort of "weirdness" to the wh...   Mar 2 2008, 10:31 AM

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