EarthPre:

Path: SC/Ephem

% Computes the earth precession matrix

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   Form:
   p = EarthPre( T )
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   Inputs
   ------
   T	(1,1) Julian centuries of 86400s dynamical time from j2000.0

   -------
   Outputs
   -------
   p	(3,3) Precession matrix

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   References:   Seidelmann, The Explanatory Supplement to the Astronomical
                 Almanac,  University Science Books, 1992, p. 103.
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Children:

Common: Time/DTSToDTA
Common: Time/Date2JD
Common: Time/JD2T

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