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Experts to prepare common standards for SBAS

Germany: Programme managers and technical experts overseeing four of the world’s regional satellite navigation augmentation systems congregated in Munich, Germany, to participate in Satellite-Based Augmentation Systems (SBAS) Interoperability Working Group (IWG) meeting. It is pertinent to mention that there was not any representation from India’s GPS and Geo-Augmented Navigation (GAGAN) team in the IWG meeting.
During the meeting, experts compared status and performance of their systems, while also hearing observations from SBAS end-users such as airlines and aircraft manufacturers. They also discussed preparing future shared SBAS standards. Among the most important achievements of the two-day meeting was the preliminary definition of a common SBAS message based on dual GPS and Galileo signals, with an aim of extending coverage to achieve quasi-global service by 2020.
According to ESA’s press statement, there’s satellite navigation and then there’s satellite augmentation – where additional ground monitoring stations and satellite transponders are used to sharpen satnav accuracy and reliability across geographical regions. The improvement makes satnav suitable for the vertical guidance of aircraft and a range of other precision applications.
Today there are three certified SBAS operational worldwide: Europe has the European Geostationary Navigation Overlay Service, EGNOS, designed and developed by ESA, operated by the European Satellite Service Provider, ESSP, and owned by the European Commission. EGNOS was made available for general users in 2009 and for aircraft landing approaches in March 2011.
The US has the Wide Area Augmentation System (WAAS), developed and operated by the Federal Aviation Administration (FAA), with an extension over Canada called CWAAS (Canadian WAAS).
Japan has the Multi-functional Satellite Augmentation System (MSAS), developed and operated by Japan’s Civil Aviation Bureau. 
Two more systems are being developed for future certification by the International Civil Aviation Authority: Russia’s System of Differential Correction and Monitoring (SDCM), under development by Roscosmos, and India’s GPS and Geo-Augmented Navigation (GAGAN) system, under development by Indian Civil Aviation and Indian Space Research Organisation (ISRO).
This week’s meeting was the first to include representatives from four out of five SBAS – excepting only GAGAN – as well as additional partners such as Eurocontrol, the European Organisation for the Safety of Air Navigation, promoting the adoption of EGNOS across Europe, promoting the adoption of EGNOS across Europe.
Source: ESA