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PostPosted: Mon Nov 08, 2010 1:39 am 
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PostPosted: Mon Nov 08, 2010 11:34 am 
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PostPosted: Mon Nov 08, 2010 2:06 pm 
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PostPosted: Mon Nov 08, 2010 3:56 pm 
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PostPosted: Tue Nov 09, 2010 6:28 am 
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PostPosted: Sat Nov 13, 2010 11:52 pm 
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If anyone plans on working with highly elliptical orbits (eccentricity over 0.3), they're going to have to find me some C++ code to solve Kepler's equation for those cases. I'm currently running the (C?) code from , which runs the < .3 case fine but sulks at everything else. This may well be because it's C rather than C++, or some other relatively simple matter that I would know about if I actually bothered to study programming.

Aside from that things are going well, at least in that I should have some useful heat data output soonish.

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PostPosted: Mon Nov 15, 2010 3:50 pm 
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PostPosted: Mon Nov 15, 2010 4:02 pm 
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PostPosted: Mon Nov 15, 2010 4:10 pm 
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Awww...


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PostPosted: Tue Nov 16, 2010 8:30 am 
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PostPosted: Tue Nov 16, 2010 1:22 pm 
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PostPosted: Wed Nov 17, 2010 4:46 pm 
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I've put up a first-draft of the temperatures chapter of my forthcoming(? hahaha, er I hope.) webbook on conworlding.
The link is right .

Please don't laugh at me too hard. I hope someday to be a n00b!

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PostPosted: Sat Nov 20, 2010 9:36 pm 
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Heat (or rather energy) oddity: around the solstices, an odd phenomenon happens at the pole pointing towards the sun - according to my pretty pictures, the latitude equal to the axial incline of the planet experiences an optimum balance of day length and sun angle and actually gets more energy per day than the latitudes directly below and above it.

Can anyone confirm that this is a real phenomenon, or has something gone wrong with my maths?

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PostPosted: Sun Nov 21, 2010 10:00 am 
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Yes - these latitudes are the tropics (of Cancer and Capricorn, on Earth).


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PostPosted: Sun Nov 21, 2010 11:56 am 
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PostPosted: Tue Nov 23, 2010 6:14 pm 
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I remember reading... somewhere(which I can't find in my current state)... that, on planets with an axial inclination in excess of 45º, the annual mean insolation is greatest at the poles. I have yet to figure out the calculations for annual mean of insolation, so I don't know.

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PostPosted: Tue Nov 23, 2010 6:52 pm 
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I think I've got things fixed now. Still a little suspicious of my day lengths, but at least I'm not getting odd blips and ridges.

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PostPosted: Tue Nov 23, 2010 7:21 pm 
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PostPosted: Tue Nov 23, 2010 8:20 pm 
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Hm. I'll leave this to the experts...
but... out of interest, will we be able to use this for planets that are tidally locked, or that have ridiculously long days?

Anyways, I'm looking forward to seeing a usable version :D


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PostPosted: Tue Nov 23, 2010 8:57 pm 
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Huhh.

You're getting what I'd instinctively expect. At 90º inclination, the whole world gets its day in the Sun.

Considering it further, I think the peak insolation was what I was reading about.

Hopefully my brain will function soon.

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PostPosted: Tue Nov 23, 2010 9:36 pm 
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PostPosted: Tue Nov 23, 2010 9:54 pm 
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Incidentally, because of refraction and the fact that if the sun's partly over the horizon it counts as daytime, the equator of a planet with 90º axial tilt would get a 24-hour-long day at both solstices.

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PostPosted: Wed Nov 24, 2010 12:06 am 
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PostPosted: Wed Nov 24, 2010 1:20 am 
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Tidal locking is one special case that would probably be worth handling.

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PostPosted: Thu Nov 25, 2010 9:35 pm 
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Well, things have passed an important threshold: I am now getting honest to goodness temperatures out.



This shows the theoretical rise in temperature that would caused by the incoming energy for one day around the (NH) winter. You can see how the oceans heat slower than the land. There are two more factors I need for a proper first pass* temperature map - the amount of heat the same areas would be losing, and a base temperature to modify.


*Calculating surface temperature relies (amongst other things) on cloud cover. Calculating cloud cover relies on air motion and moisture capacity. Which is calculated from temperature. Climate modeling is full of this kind of thing.

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