[TowerTalk] Fwd: Fwd: Strange behavior

[Hans Hammarquist]

 I suppose you mean "shortest". Also, this is valid only for an absolutely horizontal surface. If it's leaning you will get solar noon for where it's horizontal, considering the earth's curvature. Say it's leaning to the west, then you will get noon for a place to the west of you. Don't ask me how I know.

Hans

 

 

-----Original Message-----
From: Patrick Greenlee <patrick_g at windstream.net>
To: towertalk <towertalk at contesting.com>
Sent: Thu, Jan 26, 2017 11:47 am
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 at earthlink.net>
> To: towertalk <towertalk at 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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>>
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