大地测量坐标框架和重力场求定的新进展

近几年来大地测量在坐标系统和坐标框架和ITRF，WGS84，GRS80等方面进行了很多研究和改善，本文介绍了坐标原点地心的移动，大地测量基本常数的更新，直至最新的ITRF2000和WGS84（1150）的推出。在求定重力场方面发展了卫星跟踪卫星（SST）测定地球重力场及其变化的新技术。这些使大地测量学提供和处理了涉及原来是地球动力学，行星学，大气学，海洋学、板块运动学和冰川学等学科所需的信息。事实上证明大地测量学业已形成为学科交叉意义上一门科学，它将更大的影响和促进地球科学，环境科学和行星科学的发展。

New development in geodetic coordinate frame and earth gravity field determination

A lot of geodetic research work has been carried out recently in the field of coordinate system and its frame,i,e.ITRF,WGS84,GRS80and so on.The movement of Earth mass center,update of geodetic fundamental constant,and the appearance of newest ITRF2000and WGS84(1150)are intro-duced in the paper.The new technology of satellite-satellite tracking(SST)has been developed for the determination of Earth gravity field and its time-variation.Now geodesy becomes an interdisciplinary geodetic science,and it can provide and process the information necessary for other geosciences,such as geodynamics,planetology,atmospheric sciences,oceanography,tectonic movement and glaciology and so on.As a matter of fact geodesy becomes an interdisciplinary geo-science,and it will give more influ-ence and promotion on the other geo-sciences,planet sciences,and environment sciences.