Showing 7 open source projects for "theory"

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  • 1

    Tables of the Sun

    A Re-implementation of Newcomb's Theory of the Sun

    Simon Newcomb published his theory, known as Tables of the Sun, in 1898. It was used by the American Ephemeris and the Astronomical Almanac into the 1980's to compute the daily positions of the Sun. This Theory is a semi-analytic model which expresses quantities as a trigonometric series with numerical coefficients. This type of model produces a compact computer function which has enough accuracy to be useful to most users.
    Downloads: 2 This Week
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  • 2

    libnova

    Celestial Mechanics Engine

    libnova is a general purpose, double precision, celestial mechanics, astrometry and astrodynamics library.
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    Downloads: 24 This Week
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  • 3

    FERN: Fast Explicit Reaction Networks

    Quickly and explicitly solving sets of differential equations.

    FERN is a CUDA program that implements new methods for solving large sets of stiff differential equations using explicit integration methods. For the theory behind the program (due to Mike Guidry), see http://arxiv.org/abs/1112.4778 .
    Downloads: 0 This Week
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  • 4

    FreDec

    Parallelized FREquency DEComposer algorithm

    ...The GPU computing is implemented through CUDA and brings a significant performance increase. It is still possible to run FreDec solely on CPU, if no suitable GPU device is available in the system. See the details of the underlying theory in Baluev 2013, MNRAS, V. 436, P. 807 The description of the algorithm itself can be found in arXiv:1309.0100. Please go to the project forum to report any bugs.
    Downloads: 1 This Week
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  • 5

    Astronomical Papers Library

    A C library of published theories of motion of solar system objects.

    ...Currently this includes Newcomb's theories "Tables of the Sun", "Tables of Mercury", "Tables of Venus", "Tables of Mars", "Tables of Uranus", and "Tables of Neptune", Hill's theories "Tables of Jupiter" and "Tables of Saturn", as well as the theory known as "The Improved Lunar Ephemeris". Various other theories from selected astronomical journals are also included.
    Downloads: 4 This Week
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  • 6
    Java library to calculate heliocentric and geocentric planetary positions. Two types of calculations are supported: a 'fast' version which has an accuracy of about 1 arc second and a 'full' version that implements the full VSOP87 theory.
    Downloads: 3 This Week
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  • 7
    X-Bc (formerly: xbc) is a graphical user interface to the command line calculator bc. All Inputs and Outputs stays visible for editing and comparing. Functionality: trigonometry, number-theory, exponential funcs, scientific constants, primenumbers ...
    Downloads: 0 This Week
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