Two satellites that are intended to form part of the European Galileo satellite navigation system went astray from their intended orbit after launch from French Guiana on Friday, satellite launch company Arianespace said. Galileo is being built by Europe as a civil alternative to the U.S. GPS and the Russian GLONASS. The system is designed to be interoperable with GPS and GLONASS. Europe is targeting the technology at a number of applications including location-based services on mobile phones, aviation, and civil protection and surveillance.