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P03-BASED PRECESSION-NUTATION TRANSFORMATIONS

P03-BASED PRECESSION-NUTATION WALLACE1, N. CAPITAINE21 HMNAO, CCLRC / Rutherford Appleton Laboratory,Chilton, Didcot, OX11 0QX, United Kingdome-mail: Observatoire de Paris61, avenue de l Observatoire, 75014 - Paris, Francee-mail: IAU WG on precession and the ecliptic has recommended theadoption ofthe P03 models of Capitaine et al. (2003). We discuss methodsfor generating the rotationmatrices that transform celestial to terrestrial coordinates, taking into account frame bias (B),P03 precession (P), P03-adjusted IAU 2000A nutation (N) andEarth rotation.

the equinox based version, (3), the R3 rotation is a function both of Earth rotation and time, whereas in the CIO based version, (2), the rotation-related and time-related components are kept separate.

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