Approximating planets' orbits in closed-form(12th October 2014) |
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I wanted to find or create a formula which would accept an epoch timestamp, latitude and longitude and it would produce the Sun's observed azimuth and altitude in radians. It needs to take into account details earth's axial tilt and its position on its orbit around the sun. To my surprise I wasn't able to find such formula, so I had to develop it from scratch. Luckily earth's orbit (and orbits in general) is a well studied and documented problem, so I could take some shortcuts.
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