卫星重力与地球重力场的文献计量分析

Bibliometric Analysis of Satellite Gravity and Earth’s Gravity Field

卫星重力与地球重力场研究是国际大地测量学的重要研究领域,不仅带动了大地测量学本身的发展,也在其他相关研究领域取得了重要的科学应用。以2000年1月至2020年9月的20年Web of Science核心合集数据库中关于该领域的科学论文为研究对象,使用文献计量的方法,应用CiteSpace软件对当前研究现状、近年来发展脉络以及研究热点进行分析。结果表明,关于卫星重力和地球重力场的文献数量总体上逐年上升,2016年以来维持较高的水平,其中美国、德国以及中国的发文量位居前三位;发文量排名前三的研究机构分别为中国科学院、加州理工学院和美国国家航空航天局;我国在卫星重力及地球重力场领域的研究力量相对集中,中国科学院、武汉大学以及中国科学院大学发文数占中国总数的75.36%;利用GRACE数据和球谐函数构建高精度地球重力场模型,反演局部质量变化是当前国际研究热点。得益于卫星重力观测数据,全球重力场模型得到了实质性改进。

The study of satellite gravity and the Earth’s gravity field is an important research field of international geodesy,which not only drives the development of geodesy itself,but also obtains important scientific applications in related scientific fields. Taking the scientific papers in this field in the Web of Science core collection database during the 20 years from January 2000 to September 2020 as the research object,using the bibliometric methods and CiteSpace,this paper analyzes the current research status,development context and research hotspots of this field. The results show that the number of literatures on satellite gravity and the Earth’s gravity field has been increasing year by year,and has maintained a high level since 2016,and the United States,Germany and China rank among the top three in the world. The top three research institutions with the largest number of papers published are Chinese Academy of Sciences,California Institute of Technology and NASA. China’s research efforts in the fields of satellite gravity and the Earth’s gravity field are relatively concentrated. The number of papers published by the Chinese Academy of Sciences,Wuhan University and the University of the Chinese Academy of Sciences accounts for 75.36% of China’s total number in this field. Using the data of GRACE and the spherical harmonic function to construct high-precision Earth’s gravity field model,as well as retrieving local mass change,is the current international research hotspot. Thanks to the satellite gravity observation data,the global gravity field model has been substantially improved.