GALILEO - Only a Better GPS or More? Performance Analysis with the Tool NAV-SIM

Abstract

Since the European Commission (EC) decided to built up an own civil global navigation satellite system called Galileo, many people are asking why the EC want to built up an additional system. They say that they can use without any costs the U.S. navigation system GPS and, therefore, there is no need for the European GALILEO for the applications. But this is not really true. For some special applications GPS is not utilisable because it is no guarantee for the availability of the system