"Satellites already play a significant role in our daily lives, aiding communication, exploration and research. In the future, we will undoubtedly see their influence grow. GPS is perhaps one of satellite's most successful applications, and for consumers, receivers are becoming ever more affordable and reliable. The recent signing of a cooperative agreement between the United States and the European Union will expand this system, laying the foundation for a compatible and interoperable Global Navigation Satellite System, the GNSS. With this relatively young technology, improved accuracy, better reception and altogether new applications lie in wait for us in the near future."