Interesting article in GPS World... <http://www.gpsworld.com/gnss-system/augmentation-assistance/news/work-begin s-strengthening-egnos-against-solar-storms-12772?utm_source=GPS&utm_medium=e mail&utm_campaign=navigate_03_20_2012&utm_content=work-begins-strengthening- egnos-against-solar-storms-12772> Rob Kimberley