Expand description
Compute parameters needed by palAmpqk and palMapqk.
Arguments: eq = double (Given) epoch of mean equinox to be used (Julian) date = double (Given) TDB (JD-2400000.5) amprms = double[21] (Returned) star-independent mean-to-apparent parameters: - (0) time interval for proper motion (Julian years) - (1-3) barycentric position of the Earth (AU) - (4-6) heliocentric direction of the Earth (unit vector) - (7) (Schwarzschild radius of Sun)/(Sun-Earth distance) - (8-10) abv: barycentric Earth velocity in units of c - (11) sqrt(1-v^2) where v=modulus(abv) - (12-20) precession/nutation (3,3) matrix
Description: Compute star-independent parameters in preparation for transformations between mean place and geocentric apparent place. The parameters produced by this function are required in the parallax, aberration, and nutation/bias/precession parts of the mean/apparent transformations. The reference systems and timescales used are IAU 2006.
Safety
amprms will be modified.