Civil aviation' global necessity beyond GNSS-based systems

摘要

Blopbal civil aviation is rapidly moving toward utilizing GPS and it's substantial navigational advantages. Many developments are also in progress toward utilizing GPS for global ATC surveillance and landing guidance. However, there are critical shortcomings including cost, availability, and susceptibility to jamming which cannot be practically solved with GPS or GNSS-based systems. Recognition of this fact is necessary so that changes can be made toward a system meeting all the requirements at a minimum cost. it is believed that usch a system, called the Integrated Global Surveillance and Navigation System (IGSANS), will meet the requirements. It would provide ATC surveillance, area navigation, collision warning/avoidance, Cat. I landing guidance and high speed data link functions globally, and precise Cat. III landing guidance through flare, touchdown and rollout where needed in terminal areas. Airport surface surveillance would also be provided. It is a combined ground and satellite based system which would provide the needed system redundancy with substantial cost savings in both the airborne and ground/satellite facilities. IGSANS, its functional performance and economic advantages will be briefly described.