当前地震、地质灾害等现象的频繁发生,表明对于地壳运动尤其是垂直方向的研究是迫切而必需的,研究垂直地壳运动的一个重要前提就是其参考基准的确立。针对目前国内外对于全球垂直地壳运动参考基准不统一的现状,本文分析了研究该基准的必要性,提出将 ITRF2008框架下获取的卫星激光测距(satellite laser ranging,SLR)的垂向速度场作为全球垂直地壳运动参考基准的方案,论证了该方案的合理性,并分别利用GPS和甚长基线干涉测量技术的速度场数据,求取了各自速度场与 SLR 垂直基准之间的系统差,分析了产生不同大小且方向各异系统差的原因,实现了各速度场与全球垂直地壳运动参考基准的统一。由于该基准包含了较为丰富的地球物理信息,具有可发展、可提高以及直接相对于地球质心等特性,因此,推荐将 ITRF2008框架下 SLR 技术获取的垂向速度场定义为全球垂直地壳运动的参考基准。%It is urgent and necessary to study crustal motion especially in vertical direction along with high frequency happening of Earthquake and geological disasters,while the precondition is to study and establish reference datum of vertical crustal motion.Aiming at the status of disunity of global vertical crustal motion reference datum at home and abroad,its essentiality was analyzed to study global uniform reference datum of vertical crustal motion.The project of global vertical crust motion reference datum was put forward and established through SLR vertical velocity field in ITRF2008 frame,whose rationality was demonstrated too.The systematic bias between other velocity field and SLR vertical datum was resolved by using GPS and VLBI velocity observations,and realized the unity of other velocity field and global vertical crustal motion reference datum.Because of abundant geophysical information,expansibility,advancing and relative to the Earth Center,it is recommended that the vertical datum achieved by SLR techniques under the ITRF2008 framework is suitable as a reference datum of the global vertical crustal motion.
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