Satellite navigation systems such as the U.S. Global Positioning System and its aircraft, space, and ground-based augmentation systems enable unparalleled aircraft safety, performance, and airspace efficiency improvements. Rapidly evolving technological challenges include competing national spectrum priorities; modernization and sustainment of the U.S. systems; integration of complementary international systems; and increasing interference and threats to aviation safety and efficiency.

The increasing use of satellite navigation systems in aircraft avionics and air traffic control infrastructure compels the FAA to address unique policy and technical challenges that arise from the integration of satellite navigation capabilities with other technologies.

Ken Alexander is FAA's Chief Scientific and Technical Advisor for Satellite Navigation Systems. Mr. Alexander can be contacted at ken.alexander@faa.gov.