The RTCA Special Category 1 Differential GPS Instrument Approach System Standards and Future Development of DGNSS-Aided Cat. 2&3 Precision Approach Standards

Keith D. McDonald, George T. Ligler

Abstract:	In response to a request by the FAA, a SCAT-I MASPS Development Team was formed in September 1992 under the auspices of R’ICA Special Committee 159 to acceler- ate development of initial standards for GNSS-based precision approach systems to be used within the National Airspace System as early as late 1993 or 1994. A GNSS- based Special Category-I precision approach is a specially authorized approach made to MIS/U Category I minima with differential GNSS used as the primary navigation input. SCAT-I approaches will be authorized by the FAA based upon an aircraft operator’s demonstrated capability. Such authorizations are likely to be for specific aircraft approaching specific airports. This presentation over- views MASPS Team activities, highlight discussions, and addresses Team participation and accomplishments, An initial draft MASPS was issued in early January, 1993 and the Final Draft of the MASPS was completed and circu- lated in late June, 1993. This document is expected to have a significant impact on the introduction and use of DGPS- aided precision approach systems in aviation. the MASPS is under careful review by the aviation community, which leads to its fmal review by the RTCA and its planned transmittal to the FAA for their action in mid-August. With implementation, operational Category 1 precision approach operations using DGPS are anticipated at many non-public airports on a regular basis. In addition to providing needed services, this will provide operational data on DGPS-aided approaches relative to alternative techniques. This paper also addresses the planned RTCA follow-on activities and schedule for the development of MASPS for DGNSS-aided Category II and III approach operations.
Published in:	Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993) September 22 - 24, 1993 Salt Palace Convention Center Salt Lake City, UT
Pages:	851 - 851
Cite this article:	McDonald, Keith D., Ligler, George T., "The RTCA Special Category 1 Differential GPS Instrument Approach System Standards and Future Development of DGNSS-Aided Cat. 2&3 Precision Approach Standards," Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993), Salt Lake City, UT, September 1993, pp. 851-851.
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