I didn't say it wouldn't work, your synchronization idea was to use GPS,
Public GPS isn't accurate enough for our application, the military
purposely vary's the signal to thwart our enemies, you have to have the
correction frequency to get the precision military signal. And It's just
more expensive. Think about when someone hits a timing light on the
track, now they're hitting a expensive sensor. The SCTA is happy with
what they have and have it worked out. The discussion is with them.
Mike M.
-----Original Message-----
From: Jon Wennerberg [mailto:jonwennerberg@nancyandjon.org]
Sent: Wednesday, September 02, 2009 10:17 AM
To: MEIERLE Mike
Cc: land-speed
Subject: Re: [Land-speed] British Steam effort 139.843mph
On Sep 2, 2009, at 8:41 AM, MEIERLE Mike wrote:
> Basic "Rule of Thumb" in the Telecom industry is information travels 1
> foot per nanosecond. We have more accurate and complex equations when
> it comes to thruput and buffering but there are a lot of applications
> that have very strict timing requirements, and ways to measure it.
>
> Mike Meierle
> #847 F/BMMP
> SCTA-BNI/Gear Grinders/Sidewinders/ECTA ECTA Record Holder/Bonneville
> Record Holder
>
I'm still wondering what's wrong with the idea of having a timing system
that is comprised of discrete sensors that receive a common clock signal
-- and then transmit not only a sensor closure and the time at which the
event happened. Since all sensors would be using the same clock,
continuously synched together, there wouldn't be any delays for wire
length of transmission lag. Mike, you've said this won't work. Why
don't I agree -- what's wrong with the concept?
Jon
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