International Celestial Reference

The accuracy of the future international celestial reference frame obtained from astrometric satellites:SIM and GAlA are .

本文简述了国际天球参考架的发展历史和现在射电参考架的现状—基准源选择的标准和参考架的稳定性。

The following sections give the details of two equivalent ways, which called respectively "CEObased" and "equinoxbased" transformation, and three methods application, IERS routines for transformations from ITRS to GCRS.

主要介绍了IERS2003规范中国际地球参考系(ITRS)到地球质心天球参考系(GCRS)的转换过程,以及与IAU2000决议一致的常规转换公式,并详细分析了以IERS计算程序为工具、“基于CEO”[注]和“基于春分点”的ITRS向GCRS转换的两种等价方案和相应的三种应用方法,最后对新坐标系转换模型的应用进行了探讨。

The researchful progress on basic theory and method of the celestial reference system;

天球参考系的基本理论和方法研究进展

The stations constrained on international terrestrial reference frame (ITRF) and plate motion model with modern space geodetic techniques are chosen with some randoms and uncertainties,which directly affects the precision and reliability of ITRF and plate motion model.

国际地球参考架 (ITRF)和板块运动模型的台站选取标准都具有随意性 ,直接影响地球参考架和板块运动模型的精度和可信度。

The roles of global vertical datum (GVD) in detecting the sea level and recent crust movement correlated to global changes are introduced, and the relation of GVD and ITRF (International Terrestrial Reference Frame), establishment of the GVD and its precision are discussed.

介绍了全球垂直基准 (GVD)在监测与全球变化有关的海平面变化、现今地壳运动中的作用 ,论及GVD与国际地球参考架 (ITRF)的关系 ,对如何建立全球垂直基准及其精度作了讨论。