ATC
UK Company Claims Patent on GPS-Galileo Interoperability

So, first, who needs three more worldwide satnav systems, when we already have GPS? Why do these others want to spend billions just to keep up with the U.S.? There are two reasons: one political and the other practical. Politically, GPS has become a (not the) dominant technology in almost every part of human life around the world, in government, national security, industry and private life, with more than a billion receivers being used daily for thousands of applications, from simple to critical. But if you were Chinese, Russian or European, would you want to leave key control of your economy in U.S. hands? Yes, the U.S. has promised never to restrict or turn off GPS but, nevertheless, major nations still feel uncomfortable about extensive dependence on a foreign country.