[TowerTalk] And now for something completely different (TrueNorth)
aa6dx at arrl.net
Mon Aug 28 21:18:31 EDT 2006
Yep ./././ -- For the graphics to this method, take a peek at a vintage
Boy Scouts of America handbook .. worky worky! 73 Mark AA6DX
----- Original Message -----
From: "Rajiv Dewan, N2RD" <n2rd at arrl.net>
To: <towertalk at contesting.com>
Sent: Monday, August 28, 2006 7:15 AM
Subject: Re: [TowerTalk] And now for something completely different
> 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
> http://aa.usno.navy.mil/data/docs/RS_OneYear.html 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
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