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首页> 外文会议>58th International Astronautical Congress 2007 >ACCURATE TRANSFORMATION OF COORDINATES AND THE CONSTRUCTION OF OBSERVATION VECTOR OF LUNAR SATELLITE IN THE WAKE OF IAU 2000A PRECESSION-NUTATION MODEL
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ACCURATE TRANSFORMATION OF COORDINATES AND THE CONSTRUCTION OF OBSERVATION VECTOR OF LUNAR SATELLITE IN THE WAKE OF IAU 2000A PRECESSION-NUTATION MODEL

机译：IAU 2000A精密预报模型唤醒后坐标的精确转换和月球卫星观测向量的建立。

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摘要

The International Astronomical Union (IAU) has introduced the International Celestial Reference System (ICRS), the Celestial Intermediate Pole (CIP) and the Celestial Ephemeris Origin (CEO) in order to be consistent with the improved accuracies currently achieved and expected in the future for transformation from ICRS to International Terrestrial Reference System (ITRS) and vice-versa. The ICRS is fixed kine-matically using extragalactic reference sources and is independent of date and a precessing equinox has been replaced by a more stable fiducial point unlike the dynamical reference system. This paper describes the complete simulation and expressions for transformation from Geocentric Celestial Reference Frame (GCRF) to Topocentric Reference Frame (TOPRF) via ITRF which entails CEO and CIP for constructing the observation vector for the lunar satellite and is based on IAU 2000A precession-nutation model. Also results have been provided for the conventional equinox based transformation compatible with the IAU 2000A precession nutation model which differs slightly from that based on GCRF. The new model provides explicit separation between precession-nutation of the equator from Earth rotation is more simple, compact and direct than the classical one, achieving accuracies at the level of a few micro arcseconds with greatly reduced scope for accidental misuse.
机译：国际天文学联合会（IAU）引入了国际天文参考系统（ICRS），天文中间极（CIP）和天文星历起源（CEO），以与目前已实现并预期在未来实现的精度提高相一致。从ICRS转换为国际地面参考系统（ITRS），反之亦然。 ICRS使用河外参考源以运动学方式固定，并且与日期无关，并且与动态参考系统不同，进动的春分点已由更稳定的基准点代替。本文介绍了通过IRF从地心天体参考系（GCRF）转换为地心天参考系（TOPRF）的完整仿真和表达式，该过程需要CEO和CIP构造月球卫星的观测矢量，并且是基于IAU 2000A旋进法模型。还提供了与IAU 2000A岁差章动模型兼容的基于传统春分转换的结果，该转换与基于GCRF的转换略有不同。新模型提供了赤道旋进与地球自转之间的显式分离，比传统方法更简单，紧凑和直接，从而在几微弧秒的水平上实现了精确度，并大大减少了意外滥用的范围。

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