Recent developments for the Global Positioning System interference and navigation tool (GIANT)

The Global Positioning System (GPS) is a space based radionavigation system that provides accurate, continuous, worldwide service to passive users. GIANT is a one GPS-equipped platform versus many interference sources, constructive and repeatable simulation that is typically applied to determine navigation performance and operational effectiveness. GIANT runs on a PC, is US Government-owned, includes a user-friendly graphical interface for setup and execution, and runs much faster than real-time. GIANT is under formal GPS community-wide configuration control and has a growing user base. The release of Version 1.0.0 (V100) occurred in January 1999, V110 was released in December 1999, and V200 is planned for a June 2000 release. This paper provides an update to the GIANT V100 paper presented for the 1999 IEEE Aerospace Conference and discusses new functions and features for V110 and V200. Additionally, the developer´s vision for the GIANT of the future within the context of an object-oriented design and Department of Defense high level architecture requirements, is discussed