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Pages 27-29

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From page 27...
... Current and Future Applications and Requirements Civilian pilots have been utilizing GPS in uncontrolled airspace for applications such as crop dusting, aerial photography and surveying, search and rescue, and basic point-topoint navigation for some time.~3 On June 9, 1993, the Federal Aviation Administration (FAA) approved GPS for supplemental use in the domestic, oceanic, terminal, and nonprecision approach phases of flight in controlled airspace as well.
From page 28...
... These approaches are flown when the weather conditions at an airport are even worse than those described previously for Category IT As can be expected, the accuracy, integrity, and continuity of service requirements are _ ~ ~ stricter than those for Category I landing systems, and therefore, the concepts currently under development utilize local-area differential GPS augmentations, rather than the WAAS. The requirements for Category II and III, which were derived from the Federal Radionavigation Plan and existing International Civil Aviation Organization (ICAO)
From page 29...
... Department of Commerce, National Telecommunications and Information Administration, A Technical Report to the Secretary of Transportation on a National Approach to augmented GPS Services, NTIA Special Publication 94-30, November 1994, p.


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