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//! @return Delta-T in seconds
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double getDeltaTByReingoldDershowitz(const double jDay);
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//! Get Delta-T estimation for a given date.
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//! Implementation of algorithm by Banjevic (2006) for DeltaT computation.
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//! Source: Ancient eclipses and dating the fall of Babylon
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//! Publications of the Astronomical Observatory of Belgrade, Vol. 80, p. 251-257 (2006)
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//! 2006POBeo..80..251B [http://adsabs.harvard.edu/abs/2006POBeo..80..251B]
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//! @param jDay the date and time expressed as a julian day
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//! @return Delta-T in seconds
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double getDeltaTByBanjevic(const double jDay);
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//! Get Delta-T estimation for a given date.
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//! Implementation of algorithm by Islam, Sadiq & Qureshi (2008 + revisited 2013) for DeltaT computation.
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//! Source: Error Minimization of Polynomial Approximation of DeltaT
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//! Islam, S. & Sadiq, M. & Qureshi, M. S.
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//! Journal of Astrophysics & Astronomy, Vol. 29, p. 363–366 (2008)
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//! http://www.ias.ac.in/jaa/dec2008/JAA610.pdf
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//! Note: These polynomials are based on the uncorrected deltaT table from the Astronomical Almanac, thus
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//! ndot = -26.0 arcsec/cy^2. Meeus & Simons (2000) corrected the deltaT table for years before 1955.5 using
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//! ndot = -25.7376 arcsec/cy^2. Therefore the accuracies stated by Meeus & Simons are correct and cannot be
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//! compared with accuracies from Islam & Sadiq & Qureshi.
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//! @param jDay the date and time expressed as a julian day
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//! @return Delta-T in seconds
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double getDeltaTByIslamSadiqQureshi(const double jDay);
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//! Get Secular Acceleration estimation for a given year.
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//! Method described is here: http://eclipse.gsfc.nasa.gov/SEcat5/secular.html
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//! For adapting from -26 to -25.858, use -0.91072 * (-25.858 + 26.0) = -0.12932224
added
removed
src/core/StelUtils.hpp
