sofars 0.6.0

Pure Rust implementation of the IAU SOFA library
Documentation 
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/// Fundamental argument, IERS Conventions (2003):
/// general accumulated precession in longitude.
///
/// Status:  canonical model.
///
/// Given:
///    t     f64    TDB, Julian centuries since J2000.0 (Note 1)
///
/// Returned (function value):
///          f64    general precession in longitude, radians (Note 2)
///
/// Notes:
///
/// 1) Though t is strictly TDB, it is usually more convenient to use
///    TT, which makes no significant difference.
///
/// 2) The expression used is as adopted in IERS Conventions (2003).  It
///    is taken from Kinoshita & Souchay (1990) and comes originally
///    from Lieske et al. (1977).
///
/// References:
///
///    Kinoshita, H. and Souchay J. 1990, Celest.Mech. and Dyn.Astron.
///    48, 187
///
///    Lieske, J.H., Lederle, T., Fricke, W. & Morando, B. 1977,
///    Astron.Astrophys. 58, 1-16
///
///    McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003),
///    IERS Technical Note No. 32, BKG (2004)
pub fn fapa03(t: f64) -> f64 {
    /* General accumulated precession in longitude. */
    (0.02438175 + 0.00000538691 * t) * t
}