最新国际地球参考框架ITRF2014的分析与评述  

Introduction and Analysis of ITRF2014,the Latest International Terrestrial Reference Frame

作　　者：徐世依 杨力[1,2] 赵海山[1,2] 

机构地区：[1]解放军信息工程大学导航与空天目标工程学院,河南郑州450001 [2]北斗导航应用技术河南省协同创新中心,河南郑州450001

出　　处：《海洋测绘》2017年第2期6-10,共5页Hydrographic Surveying and Charting

摘　　要：介绍ITRF2014的定义、测站分布、输入数据、分析策略以及与ITRF2008的转换参数,并分析ITRF2014相对于ITRF2008的改进。ITRF2014是国际地球参考框架ITRF的最近一次更新,它是基于四种空间大地测量技术(VLBI、SLR、GNSS和DORIS)重新处理解实现的。相较于ITRF2008,ITRF2014不仅在观测数据和测站数量上有所增加,还改善了对非线性运动的处理,包括对周期性信号的估计以及对震后形变(post-seismic deformation,PSD)的改正,并提供了PSD模型和地球质心运动模型两个新产品。ITRF2014为地球科学等相关领域的研究与应用提供了统一的空间基准,也为其他坐标框架的维持与精化提供了参考。The definition,station distribution,input data,analysis strategy of ITRF2014 and its transformation parameters with ITRF2008 are introduced. Then improvements of ITRF2014 compared with ITRF2008 are analyzed. ITRF2014 is the recent update of International Terrestrial Reference Frame （ ITRF ）,based on completely reprocessed solutions of the four space geodetic techniques （ VLBI,SLR, GNSS and DORIS） . Compared with ITRF2008, ITRF2014 not only has more observation data and observing stations,but also has improved the handling of non-linear station motions such as periodic signals and Post-Seismic Deformation （PSD） ,and it provides two new products including PSD model and geocenter motion model.ITRF2014 provides a uniform spatial datum for the research and application of geoscience and other related subjects and a reference for the maintenance and refinement of other terrestrial reference frames.

关 键 词：ITRF2014 ITRF2008 PSD模型 测站非线性运动 转换参数 

分 类 号：P226[天文地球—大地测量学与测量工程]