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15.5.207 fapa03


[SOFA] Returns the general accumulated precession in longitude in radians, a fundamental argument according to the iers conventions of 2003, as a function of the number tc of Julian centuries since J2000.0 TDB. It makes no practical difference if tc is measured since J2000.0 TT instead. The result has the same dimensions as tc.

See also: Astronomical Coordinate Calculations