[time-nuts] BYMLBI (Back Yard Medium LBI)
Eric Garner
garnere at gmail.com
Sat Mar 19 15:51:39 UTC 2011
Sent from my Banana jr (tm) Mobile Device
On Mar 18, 2011, at 9:20 PM, lists at lazygranch.com wrote:
> 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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