[time-nuts] What position is measured?
Mark J. Blair
nf6x at nf6x.net
Wed Sep 8 00:40:29 UTC 2010
On Sep 7, 2010, at 5:16 PM, jimlux wrote:
> Yes.. except that the cable's physical and electrical length *do* vary with temperature, so if you're looking at the gnat's eyelash sort of thing, you need to take that into account. Maybe 10 ppm/degree, so a 20 meter run will change a bit less than a millimeter. That's down in the fractional picoseconds time-wise.
> It's an issue if you're doing things like interferometry at higher frequencies..
I see a bright future selling oven-controlled speaker cables to audiophiles... ;-)
Mark J. Blair, NF6X <nf6x at nf6x.net>
Web page: http://www.nf6x.net/
GnuPG public key available from my web page.
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