Considerations for the FAA Category I Local Area Augmentation System Ground Specification

Trent A. Skidmore, Frank van Graas, and Maarten Uijt de Haag

Abstract:	The Federal Aviation Administration (FAA) Local Area Augmentation System (LAAS) Ground System Specification will set the standard for all Category I (and eventually Category 11/HI) LAAS installations. This specification will ultimately be used by the FAA (and other agencies) to procure a significant number of LAAS installations to be used at major airports by airlines during revenue service. To this end, the FAA LAAS Ground System Specification must include all the requirements necessary to ensure a public-use, interoperable, maintainable approach and landing aid. This paper includes a qualitative description of a functional flow diagram that can be used to develop the LAAS Ground Specification. The flow diagram includes the core elements envisioned to be necessary to achieve the operational goals of the LAAS ground system. Also discussed are the RTCA LAAS Minimum Aviation System Performance Standards (MASPS) Ground Accuracy Designator (GAD) curves. These GAD curves specify the standard deviation of the error in the differential corrections sent to the aircraft. An interpretation of the GAD curves, along with their limitations is discussed. Finally, data for partial validation of the GAD curves are presented.
Published in:	Proceedings of the 54th Annual Meeting of The Institute of Navigation (1998) June 1 - 3, 1998 The Adams Mark Hotel Denver, CO
Pages:	103 - 112
Cite this article:	Skidmore, Trent A., van Graas, Frank, de Haag, Maarten Uijt, "Considerations for the FAA Category I Local Area Augmentation System Ground Specification," Proceedings of the 54th Annual Meeting of The Institute of Navigation (1998), Denver, CO, June 1998, pp. 103-112.
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