Shortest.
Al
AB2ZY
________________________________________
From: TowerTalk <towertalk-bounces@contesting.com> on behalf of Patrick
Greenlee <patrick_g@windstream.net>
Sent: Wednesday, January 25, 2017 6:36 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Fwd: Strange behavior
Shadows are ALWAYS longest at solar noon, irrespective of season.
Patrick NJ5G
On 1/24/2017 1:23 PM, Hans Hammarquist via TowerTalk wrote:
> 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
>>>
>>> _______________________________________________
>>>
>>>
>>>
>>> _______________________________________________
>>> TowerTalk mailing list
>>> TowerTalk@contesting.com
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>>
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