Topic: TAC Monthly Meeting
Lucia Cappelletti at MeteoSwiss Title: OSCAR/Surface: achievements and challenges Abstract: The Observing System Capabilities Analysis and Review (OSCAR) Tool is one of the main components of the WMO Integrated Global Observing System (WIGOS) framework. In an effort to integrate all WMO observing systems, both space- and surface-based, OSCAR provides metadata that enable adequate use of meteorological and climatological observations. Additionally, OSCAR hosts technology free and quantitative observational user requirements of WMO Application Areas in support of the Rolling Review of Requirements process, a comparison of current and future observing capabilities and observational requirements, for network planning and efficient use of resources. The surface-based component of OSCAR (OSCAR/Surface) was specified and developed in a joint venture between WMO and the Swiss Federal Office of Meteorology and Climatology. After a few years of juggling unclear or moving requirements, technology constraints and a demanding business logic, the web application became operational in May 2016. In order to harmonize observational metadata from a large and diverse number of communities, OSCAR/Surface implements the semantic WIGOS Metadata Standard (WMDS) and its application schema, the WIGOS Metadata Data Representation (WMDR). The technical design of the system is based on the Service Oriented Approach (SOA) paradigm integrated via the Open Service Gateway initiative (OSGi) service platform. RESTful APIs allow interoperability with external systems for observation discovery and metadata provision. A Graphical User Interface in support of metadata discovery, visualization and management makes the system accessible by users with any level of IT skills and provenance. As of today, the web-application is used by almost all 187 WMO Member States and holds metadata for more than 20 thousand climatological and meteorological platforms, on land and sea and in the air.