M3G - Metadata Management and Distribution System for Multiple GNSS Networks

M3G, which stands for "Metadata Management and Distribution System for Multiple GNSS Networks", is developed and maintained by the GNSS team at the Royal Observatory of Belgium. M3G consists of a web portal and an application programming interface (API), and provides free online access to validated and standardized GNSS station metadata including IGS-style site log files as well as information about local networks, DOIs, station pictures, etc. Registered agencies can upload, validate, and distribute GNSS station metadata via the M3G portal. M3G is free to use and is developed in alignment with FAIR data principles.

M3G，全称为“多全球导航卫星系统元数据管理与分发系统”，由比利时皇家天文台的GNSS团队研发与维护。该系统由一个网络门户和应用编程接口（API）组成，并向公众免费提供经过验证和标准化的GNSS站点元数据在线访问服务，包括IGS风格的站点日志文件以及关于本地网络、数字对象标识符（DOI）、站点图片等信息。注册机构可通过M3G门户上传、验证和分发GNSS站点元数据。M3G的使用免费，其开发遵循FAIR数据原则。