Towertalk
[Top] [All Lists]

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

 To: "Rajiv Dewan, N2RD" , Re: [TowerTalk] And now for something completely different(TrueNorth) "Jim Miller" Sat, 16 Sep 2006 18:49:14 -0500
 ```According to "true north", is the North Star really at 0.00 degrees from north? Is it our actual "true north"? 73, Jim ----- Original Message ----- From: "Rajiv Dewan, N2RD" To: Sent: Monday, August 28, 2006 9:15 AM Subject: Re: [TowerTalk] And now for something completely different (TrueNorth) > 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 > North. > > Regards, > 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: www.w0uce.net > > > > ailman/listinfo/towertalk > > _______________________________________________ > > > > _______________________________________________ > TowerTalk mailing list > TowerTalk@contesting.com > http://lists.contesting.com/mailman/listinfo/towertalk > _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk ```
 Current Thread Re: [TowerTalk] And now for something completely different(TrueNorth), Jim Miller <=