fapa03¶

Fundamental argument, IERS Conventions (2003): general accumulated precession in longitude.

Parameters:

tdouble array

Returns:

c_retvaldouble array

Notes

Wraps ERFA function eraFapa03. The ERFA documentation is:

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 e r a F a p a 0 3
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Fundamental argument, IERS Conventions (2003):
general accumulated precession in longitude.

Given:
   t     double    TDB, Julian centuries since J2000.0 (Note 1)

Returned (function value):
         double    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)

This revision:  2021 May 11

Copyright (C) 2013-2023, NumFOCUS Foundation.
Derived, with permission, from the SOFA library.  See notes at end of file.

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fapa03¶