[time-nuts] Using GPS for space-based instrument

Marco IK1ODO -2 ik1odo at spin-it.com
Tue Nov 11 08:49:21 UTC 2008


At 09.37 11/11/2008, you wrote:
>Both Symmetricom and Frequency Electronics provide specialist space
>qualified products. It's not just a case of ruggedisation, but radiation
>hardening, g sensitivity which need to be designed in.
>
>Rob Kimberley

Also, space qualified GPS must handle the larger doppler shifts due 
to the relative spacecraft velocity. A "standard" GPS will not work, 
it is necessary to modify the algorhytms.

Karl, if you know nothing about GPS, possibly it's best to start 
reading a tutorial, like http://www.trimble.com/gps/index.shtml - the 
amount of information to digest before putting a GPS receiver on a 
spacecraft is huge.

Marco





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