Compute parameters needed by palAmpqk and palMapqk palMappa
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.
(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-v2) where v=modulus(abv)
(12-20) precession/nutation (3,3) matrix
For date, the distinction between the required TDB and TT is always negligible. Moreover, for all but the most critical applications UTC is adequate.
The vector amprms(1-3) is referred to the mean equinox and equator of epoch eq.
The parameters amprms produced by this function are used by palAmpqk, palMapqk and palMapqkz.