[time-nuts] PC time app
David J Taylor
david-taylor at blueyonder.co.uk
Sat Nov 26 06:24:23 UTC 2011
> I'm curious as to what folks are doing with PC's that require micro
> second
> accuracy for days or weeks or what have you.
>
> Any examples?
>
> Curious,
> Steve
I hear of folks measuring time delay of off-air radio signals, where
millisecond accuracy is required. Data from multiple receivers in
multiple locations is compared. You need good accuracy for geolocating
weather satellite data - one second timing error can result in a 7 km
location error, so orbit prediction accuracy comes into that as well.
It's a similar requirement when pointing a narrow beamwidth antenna at a
distant satellite - note that they had to add a wider beamwidth antenna to
one of the ESA dishes trying to talk to the Phobos-Grunt probe recently.
Milliseconds suits me, though.
Cheers,
David
--
SatSignal software - quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor at blueyonder.co.uk
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