IERS地球参考系统、大地测量常数及其实现

TERRESTRIAL REFERENCE SYSTEM,GEODETIC CONSTANTS AND THEIR REALIZATION

介绍了国际地球自转服务局(IERS,International Earth Rotation Service)所定义的地球参考系统、大地测量常数及其实现,IERS规范(2003)中一些新的内容,特别是IERS采用国际地球参考系统2000(ITRS2000)后的一些新进展。对ITRS2000的实现,即国际地球参考框架2000(ITRF2000)的定义、主要参数、及其应满足的条件进行了研究,重点指出了它和历史上各个ITRFyy的不同、特色及其联系。

Terrestrial reference systems, geodetic constants and their realization defined by IERS are introduced in the paper. Some new contents in the IERS Convention 2003, especially the new developments after the employment of International Terrestrial Reference System 2000 （ITRS2000） are emphasized. The realization of ITRS2000, i.e. the definition, main parameters of International Terrestrial Reference Frame 2000 （ITRF2000） and conditions which ought to be satisfied by the frame are studied. The differences between ITRF2000 and the previous ITRFyy in the history and respective characteristics are pointed out. Besides, the relationships including their transformation parameters among the previous ITRFyy are also given in the paper.