StelUtils.hpp   StelUtils.hpp 
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//! @param ndot value n-dot which use in the algorithm //! @param ndot value n-dot which use in the algorithm
//! @return SecularAcceleration in seconds //! @return SecularAcceleration in seconds
//! @note n-dot for secular acceleration of the Moon in ELP2000-82B is -23.8946 "/cy/cy //! @note n-dot for secular acceleration of the Moon in ELP2000-82B is -23.8946 "/cy/cy
double getMoonSecularAcceleration(const double jDay, const double nd ot); double getMoonSecularAcceleration(const double jDay, const double nd ot);
//! Get the standard error (sigma) for the value of DeltaT //! Get the standard error (sigma) for the value of DeltaT
//! @param jDay the JD //! @param jDay the JD
//! @return sigma in seconds //! @return sigma in seconds
double getDeltaTStandardError(const double jDay); double getDeltaTStandardError(const double jDay);
//! Get value of the Moon fluctuation
//! Source: The Rotation of the Earth, and the Secular Accelerations
of the Sun, Moon and Planets
//! Spencer Jones, H.
//! Monthly Notices of the Royal Astronomical Society, 99 (1939), 54
1-558
//! 1939MNRAS..99..541S [http://adsabs.harvard.edu/abs/1939MNRAS..99
..541S]
//! @param jDay the JD
//! @return fluctuation in seconds
double getMoonFluctuation(const double jDay);
//! Sign function from http://stackoverflow.com/questions/1903954/is -there-a-standard-sign-function-signum-sgn-in-c-c //! Sign function from http://stackoverflow.com/questions/1903954/is -there-a-standard-sign-function-signum-sgn-in-c-c
template <typename T> int sign(T val) template <typename T> int sign(T val)
{ {
return (T(0) < val) - (val < T(0)); return (T(0) < val) - (val < T(0));
} }
//! Compute cosines and sines around a circle which is split in "seg ments" parts. //! Compute cosines and sines around a circle which is split in "seg ments" parts.
//! Values are stored in the global static array cos_sin_theta. //! Values are stored in the global static array cos_sin_theta.
//! Used for the sin/cos values along a latitude circle, equator, et c. for a spherical mesh. //! Used for the sin/cos values along a latitude circle, equator, et c. for a spherical mesh.
//! @param slices number of partitions (elsewhere called "segments") for the circle //! @param slices number of partitions (elsewhere called "segments") for the circle
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