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Re: [TowerTalk] And now for something completely different (TrueNorth)

Subject: Re: [TowerTalk] And now for something completely different (TrueNorth)
From: "Rajiv Dewan, N2RD" <>
Date: Mon, 28 Aug 2006 10:15:46 -0400
List-post: <>
The stick at high noon is a very good method and a lot more useful  
than stars at night.  You do not have to live exactly at the time  
zone meridian.  You just have to find the sunrise and sunset for  
*your* location and date.  So here are the steps:

1.  Find the sunrise and sunset time for the location and day you are  
going to do the experiment.  You can find that in your local  
newspaper or visit and type in the  
state and city.   (For even greater accuracy and greater generality,  
you can enter the exact latitude and longitude instead of using the  
city/state combination)  The web site has the times in ST without the  
daylight correction.
For example it lists the sunrise and sunset times are 0530 and 1852  
EST for Rochester, NY on August 28, 2006.   With the daylight  
correction the times are 0630 and 1952 EDT.

2.  Compute the mid point which is high noon for the day and location  
specified.  The duration of the day is 19:52 - 06:30 = 13 h 22 min.
Half of that is 6h 41 min.  Adding that to 6h 30 min (sun rise time),  
I get  1:11PM EDT.

3.  The shadow of a vertical stick (use a plumb line for greater  
accuracy) at 1:11PM on August 28, 2006 at Rochester, NY points due  

Raj, N2RD

> Here we go again.
> This method only works for those who live exactly on the time zone
> meridian.
> Don
> N8DE
> J A Ritter wrote:
> Two sticks, one vertical, the other horizontal placed along the  
> path of
> the
> shadow at high noon will show True North...
> 73,
> Jack W0UCE
> Website:
> ailman/listinfo/towertalk


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