http://news.bbc.co.uk/2/hi/science/nature/4417290.stm
Cool..
one of the key components of the Galileo set-up that should allow top-level subscribers to know their position on the planet down to a few centimetres.
The first four satellites that will be used in the Galileo constellation proper have already been ordered and will fly in 2008-9. The remaining 26 will be sent up in batches to complete the network by the end of 2010.
Cool..