[TowerTalk] Positoners Calibration to True North

[Jim Lux]

At 04:28 AM 12/2/2005, K8RI on Tower talk wrote:

>----- Original Message ----- From: "Jim Lux" <jimlux at earthlink.net>
>To: "AD5VJ Bob" <rtnmi at sbcglobal.net>
>Cc: "Tower Talk List" <towertalk at contesting.com>
>Sent: Friday, December 02, 2005 7:01 AM
>Subject: Re: [TowerTalk] Positoners Calibration to True North
>
>
>>At 09:24 PM 12/1/2005, AD5VJ  Bob wrote:
>>>Doesn't the location of the sun and Polaris depend on the
>>>month and season of the year?
>>
>>
>>The position of the sun at "local solar noon" is always on the N/S line,
>>what changes over the year is the time offset between local solar noon on a
>>particular day, and mean "noon" averaged over the year.  That is, the "wall
>>clock time" for local solar noon varies a bit.  The difference is pretty
>>substantial (minutes).
>
>If your zip code is close enough, go to Web Weather, 
>http://www.wunderground.com enter your location and in the astronomical 
>table enter "extended view" and it'll give solar noon in local time.  For 
>instance, here in Midland MI solar noon is 12:26 EST today.


Or, the USNO site at http://aa.usno.navy.mil/  (go to data)
http://aa.usno.navy.mil/data/docs/RS_OneDay.html is the exact page

>Roger Halstead (K8RI and ARRL 40 year Life Member)
>N833R - World's oldest Debonair CD-2
>www.rogerhalstead.com


Jim