OSCAR is an important part of WIGOS. It has four components (see diagram below): OSCAR/Surface and OSCAR/Space contain information about surface- and space-based observing system capabilities; OSCAR/Requirements contains user requirements for all Application Areas supporting WMO Programmes, and OSCAR/Analysis is used to compare those requirements with the observing system capabilities (RRR, "Critical Review"). This allows experts and observing system operators to identify gaps and supports their planning efforts. OSCAR/Space has been available in pre-operational mode at the WMO Secretariat since 2012. In 2014, WMO and MeteoSwiss concluded an agreement to jointly develop the surface, requirements and analysis components.
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