北斗在地壳形变监测中的应用进展

北斗卫星导航系统(BDS)于2020年建成并开始向全球提供服务。如何提高其在防灾减灾领域的应用是目前关注的焦点。本文梳理了国内外采用BDS数据开展地壳形变(包括同震和震间形变获取)研究的现状,总结了BDS数据的定位精度,归纳出基于BDS数据的地壳形变监测需要进一步解决、有待拓展的关键问题:①扩展GNSS地壳形变监测的内涵,采用GPS与BDS双模或多模算法提高形变解算精度;②开展BDS实时形变监测在地质灾害早期识别中的应用;③开发、发布相关数据处理算法与软件系统,切实推进BDS在高精度地壳形变监测领域的应用。

Application progress of BDS in monitoring crustal deformation

BDS has been completed in 2020 and begins to provide services to the world.Here,we focus on its application in disaster prevention and mitigation.In this study,we present the application of BDS data in crustal deformation research,including monitoring coseismic and interseismic crustal deformation.We also summarize the positioning accuracy of BDS data.Besides,we summarize several key issues,which need to be further solved and expanded,regarding the application of BDS data in crustal deformation.First,in terms of expanding the connotation of GNSS in crustal deformation monitoring,a dual-mode or multi-mode algorithm incorporating both GPS and BeiDou is needed,to improve the positioning accuracy.Second,we need to carry out the application of BDS real-time deformation monitoring in the early identification of geological disasters.Third,we need to develop and publish data processing algorithms and software in order to promote the application of BDS in high-precision crustal deformation monitoring.