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Re: Day/Night Terminator on Map Projection [message #48347 is a reply to message #48311]

Thu, 13 April 2006 16:15

JD Smith
Messages: 850
Registered: December 1999

Senior Member

On Fri, 07 Apr 2006 18:26:15 -0600, David Fanning wrote:

> Hi Folks,
>
> Does anyone have IDL code for calculating the day/night
> terminator on a map projection? Or perhaps an example of
> a map in which you have done this?
>
> If the code is not proprietary, maybe I'll write an article
> about this. It can't be the first time someone has needed
> such a thing. Direct graphics, is what has been requested of
> me. :-)

I guess you saw this page too:

http://fermi.jhuapl.edu/s1r/idl/s1rlib/sphere/earth.html#sun clock

Those twilight bands are cool (usually defined as where the sun is 6, 12,
and 18 degrees below the horizon). You might have some fun adding those.

JD

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[Message index]

		Day/Night Terminator on Map Projection By: David Fanning on Fri, 07 April 2006 17:26
		Re: Day/Night Terminator on Map Projection By: JD Smith on Thu, 13 April 2006 16:15
		Re: Day/Night Terminator on Map Projection By: David Fanning on Thu, 13 April 2006 08:20
		Re: Day/Night Terminator on Map Projection By: Haje Korth on Thu, 13 April 2006 05:10
		Re: Day/Night Terminator on Map Projection By: David Fanning on Wed, 12 April 2006 23:00

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