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From: =?ISO-8859-1?Q?Hans-Bernhard_Br=F6ker?= <HBBroeker@t-online.de>
Newsgroups: comp.arch.embedded,comp.realtime
Subject: Re: Comparing phase of physically distant signals
Date: Sun, 04 Aug 2013 15:58:49 +0200
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On 03.08.2013 21:57, Don Y wrote:

> To be clear:  distances are on the order of a city block
> (but in three axis, not just two).  Events are synchronized to
> something on the order of tens to hundreds of nanoseconds.

No, they're not.  Because over that distance, they cannot be.  It's just 
flat-out impossible, because the thing you're trying to measure doesn't 
physically exist.