Bureau Gravimetrique International

The International Gravimetric Bureau (BGI) is the scientific service of the International Association of Geodesy (IAG) for gravimetry. It has been created in 1951 by the IUGG (International Union in Geophysics and Geodesy) with the aim to collect on a world-wide basis, all gravimetric measurements on Earth and to establish the global digital database of gravity data for scientific use. Its main task is to collect, validate and archive all types of gravity measurements (relative or absolute) acquired on the Earth�s surface from land, marine and airborne surveys. The global databases operated by BGI (relative or absolute gravity measurements, reference stations) and their derived products (for instance global or regional grids of gravity anomalies) are mostly dedicated for supporting scientific applications for a wide international community concerned by the studies of the Earth gravity field. BGI also contributes to the dissemination of information, documentation and software for educational and research purposes. BGI is recognized as the reference scientific service for gravimetry by the International Council for Science (ICSU), by the Global Geodetic Observing System (GGOS) and by the World Data System (WDS).

国际重力局（BGI）是国际大地测量协会（IAG）下属负责重力测量研究的科学服务机构。该机构由国际大地测量与地球物理联合会（IUGG）于1951年创立，旨在全球范围内收集所有地球重力测量数据，并建立面向科学研究的全球重力数据数字数据库。其核心任务为收集、校验并归档所有通过陆地、海洋与航空勘测在地球表面获取的各类重力测量数据，涵盖相对重力测量（relative gravity measurements）与绝对重力测量（absolute gravity measurements）。BGI运营的全球数据库（包含相对/绝对重力测量数据、参考站数据）及其衍生产品（例如全球或区域重力异常网格），主要用于为关注地球重力场研究的广大国际学界提供科学应用支持。此外，BGI还面向教育与科研目的，开展信息、文献与软件的传播服务。国际科学理事会（ICSU）、全球大地测量观测系统（GGOS）以及世界数据系统（WDS）均认可BGI作为重力测量领域权威参考科学服务机构的地位。