[time-nuts] BYMLBI (Back Yard Medium LBI)
lists at lazygranch.com
lists at lazygranch.com
Sat Mar 19 04:20:08 UTC 2011
http://www.astronomycast.com
Episode 211 was a good primer on celestial navigation. It covers time piece construction.
Building your own backyard continental drift hardware would be high on the coolness scale.
------Original Message------
From: Wolfgang
Sender: time-nuts-bounces at febo.com
To: Discussion of precise time and frequency measurement
ReplyTo: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] BYMLBI (Back Yard Medium LBI)
Sent: Mar 18, 2011 8:58 PM
On Friday 18 March 2011, Brooke Clarke wrote:
> For a number of decades I've tried to figure out a way to measure the
> period of the Earth's rotation accurate to at least 1 ms.
>
> [...]
>
> Is it possible to do it using a radio method in my (large) back yard?
>
1 ms / day = 1.2e-8 = 460um position accuracy on the ground.
If the measurement takes more than a couple of days, continental drift
may need to be considered.
- Wolfgang, DL1SKY
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