摘要: |
This report documents the development of recommendations for a national approach to augmented Global Positioning System (GPS) services. The study team identified Federal navigation, positioning, and timing requirements for land, marine, air and space modes of operation. The study team then evaluated numerous operating and proposed systems that augment the GPS Standard Positioning Service. The most promising systems were combined in six different architectures intended to meet the widest possible range of user requirements. Based on the architecture evaluations, the study team developed a set of recommendations for a coordinated, national approach to augmented GPS services that meet Federal requirements while avoiding unnecessary duplication of facilities. |