Hi Jack,

        That's a wonderful idea, I'll let you know when I have a plot image to
share.

Best,

Luke 

Jack Aubert wrote:
> 
> Lueke,
> That is really cool stuff.  And it runs fastl
> Here's another idea if you're interested.  I tried to do this a few years
> ago just using a spreadsheet to do the plots; I think I got it working
> eventually, but the display left a lot to be desired.
> 
> Having lived at different latitudes, I was always intrigued by the rate of
> change in the length of the day.  It always changes fastest at the equinox,
> but the change is much more abrupt at higher latitudes so that in Helsinki,
> for example, winter turns abruptly to summer with its long days, lingering
> twighlight and (almost) midnight sun.  In Kinshasa, the length of the day
> is virtually constant and there is almost no twilight.
> 
> The idea is to plot the daylight hours (hours against date) as a function
> of latitude:  Chose the latitude and show the daylight length over a year.
>   At the equator it will be flat.  Moving north, it would become a sine
> curve until the arctic circle where the top and bottom of the curve would
> be truncated by the 24 hour limit of the day and it would look like four
> almost-vertical lines.
>

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