Improvement of reference system field in the IERS 1996 conventions.

Details Improvement of reference system field in the IERS 1996 conventions. Improvement of reference system field in the IERS 1996 conventions.

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pabei..17..104x&link_type=abstract

Prog. Astron., Vol. 17, No. 2, p. 104 - 112

Astronomy and Astrophysics

Astronomy

Reference Systems: Earth, Earth Rotation

Scientific paper

IERS 1996 conventions define the current best standard reference system. The reference system field is briefly and systematically described, in comparison with IERS 1992 standards, the major improvements made up with IERS 1996 conventions are presented. The number of defining source in celestial reference frame increases from 57 to 236, the planetary and lunar ephemerides are the JPL DE403/LE403 instead of DE200/LE200, and the NUVEL NNR-1A model for plate motion replaces the NUVEL NNR-1 model, the numerical values of 9 fundamental constants are changed, an empirical model, the IERS 1996 theory of precession/nutation, to be used to predict the difference in the celestial pole coordiantes between observation and theory is added, the expression of the total potential in the delay equation is modified to be consistent with the SI second.

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