WAAS MOPS Requirements – Validation Testing and Results

Mark Lorenz, Brent Harding, and Tim Cashin

Abstract:	The FAA has sponsored varied efforts to validate requirements defined in the RTCA Document “Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airborne Equipment”, commonly referred to as the WAAS MOPS [1]. Stanford Telecommunications (STel) has recently conducted a study for the FAA to evaluate the MOPS requirements through Change 1 [2] for Beta class-3 equipment and test an experimental FAA User Platform (UP). This effort consisted of: (1) the development of a WAAS Receiver Test Tool (WRTT) to provide a controlled RF signal environment for testing the UP and isolating its performance relative to the MOPS requirements. (2) upgrading the UP software to be compliant with the Beta The results of this study demonstrated that all of the Beta class-3 requirements are testable, and that the standardized MOPS test cases can be reasonably executed. The upgraded UP satisfied all of the 187 software-based requirements with a few exceptions that were traceable to interpretation of the requirements and/or modifications needed in the test tool or UP software implementation.
Published in:	Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998) September 15 - 18, 1998 Nashville, TN
Pages:	111 - 120
Cite this article:	Lorenz, Mark, Harding, Brent, Cashin, Tim, "WAAS MOPS Requirements – Validation Testing and Results," Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998), Nashville, TN, September 1998, pp. 111-120.
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