On the celestial reference frame independent of the dynamical planes of the earth

Details On the celestial reference frame independent of the dynamical planes of the earth On the celestial reference frame independent of the dynamical planes of the earth

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992cha%26a..16..103z&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 16, Issue 1, p. 103-108.

Astronomy and Astrophysics

Astrophysics

Celestial Reference Frame, Absolute Measurement-Equinox And Precession

Scientific paper

Up to now, all the Conventional Celestial Reference Frames (CCRF), such as FK5 as well as available radio source catalogues, are traditionally based on the conceptions of the equator, ecliptic, precession and nutation. Therefore, any changes in the expressions of precession or nutation as well as in the definitions of the equator or ecliptic must require a reconstruction of the CCRF. Such work is so heavy and complicated that it can not be done strictly. In addition, the errors in the expressions of precession or nutation may cause some distortion in CCRF.
In principle, a celestial coordinate triad can be defined by an arbitrary group of objects (stars or radio sources). Referring to it, a Directly defined Celestial Reference Frame(DCRF) can be constructed. In this paper, we prove that the DCRF can be realized and can be applied to astrometry and geodesy. DCRF is independent of the dynamical planes of the earth.

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