Helicopter gathers EGNOS and simulated Galileo signals
Helicopter flight over 'Galileo valley' guides future satnav A helicopter recently flew over a very special Alpine valley to gather data on how Europe's two satellite navigation systems - EGNOS and Galileo - will work together in future. The helicopter flew a variety of manoeuvres, from fast loops to mid-air hovering, to see how satnav signals were received in practice. The promising results are now being analysed. The airborne testing, which took place in Germany on 24-26 September, was based around prototype signals of the next generation of the European Geostationary Navigation Overlay Service - EGNOS - combined with simulated Galileo signals. EGNOS, the first pan-European satellite navigation system, works by sharpening the accuracy of US GPS signals. The first four Galileo satellites have been placed in orbit - the minimum needed to provide basic navigational services. It will take many more to provide global coverage.
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