Maybe it's The Photographer's Ephemeris (TPE), often mentioned here by
Ken. In any case TPE is available for most platforms including Windows,
MAC, iPhone, iPad, iPod Touch and Android. The desktop versions for
Windows and Mac are free. Get it here:
<http://photoephemeris.com/>
In short you get a Google based map centered on your location and a
table with phase of the moon, sunrise/set, moonrise/set and four lines
drawn over the map indicating the directions of sun/moon/rise/set from
you location.
Your task is to figure out the date using TPE when the sun sets directly
over US 30 at your location. The interface is a bit unusual but you'll
eventually figure it out.
Chuck Norcutt
On 7/30/2013 1:12 AM, Chris Barker wrote:
> That will change as we move to the end of summer, Paul. The sun sets in the
> northwest in high summer, in the northern Hemisphere, and in the southwest in
> winter; it's a similar change for sunrise, of course. There's an excellent
> app for the iPad and iPhone which will help . . .
>
> Chris
>
> On 30 Jul 2013, at 06:08, Paul Braun <pbraun42@xxxxxxxxx> wrote:
>
>> My only real frustration is that the Sun sets too far to the North - I
>> want it to set exactly over the end of the strip. I'm pretty sure
>> that's outside of my powers....
>
--
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