To add "salt to the injury" the solar noon varies a little for different times
of the years.
Hans - N2JFS
-----Original Message-----
From: jimlux <jimlux@earthlink.net>
To: towertalk <towertalk@contesting.com>
Sent: Mon, Jan 23, 2017 11:49 pm
Subject: Re: [TowerTalk] Strange behavior
On 1/23/17 6:22 PM, Roger (K8RI) on TT wrote:
Noon by the clock, or noon by the sun (solar time)? Depending on
location, the clock can be nearly an hour off particularly if in a state
with a skewed time zone, or near the edge of a time zone. Michigan
(where I live) is near the Western edge of the Eastern time zone. My
location is off by nearly an hour between EST and Solar time.
73, Roger (K8RI)
The Naval Observatory Astronomical Applications site generates tables
that are corrected for your location, etc.
http://aa.usno.navy.mil/data/index.php
you're looking for "Sun transit"
http://aa.usno.navy.mil/data/docs/RS_OneDay.php
On 1/23/2017 3:31 PM, Jim Brown wrote:
On Mon,1/23/2017 8:32 AM, Michael Clarson wrote:
David's method of using a topo map and sighting an object is the best
way.
That works IF you can see the distant object. My towers are in a dense
redwood forest. I established true north from the shadow of the tower
at solar noon using online tables by date, on a day when the sun got
through the trees to cast a shadow at noon, and laid down a log along
the shadow.
https://www.esrl.noaa.gov/gmd/grad/solcalc/
73, Jim K9YC
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