The WAAS Receiver and Signal in Space Validation Program

Todd R. Lardy

Abstract:	The Naval Air Warfare Center Aircraft Division has been tasked by the Federal Aviation Administration (FAA) through an Interagency Agreement to support the Initial Operating Capability (IOC) of the Wide Area Augmentation System (WAAS). A key element of NAWCAD’s support to the FAA is to verify the compliance of the WAAS Signal in Space (SIS) with the WAAS Minimum Operational Performance Standards (MOPS). Previously, NAWCAD validated MOPS compliance with the Enhanced Miniaturized Airborne Global Positioning System Receiver (EMAGR). The EMAGR is used by NAWCAD and a number of other FAA, DOD, and international organizations to support the WAAS Developmental and Operational Test (DT/OT). In addition, NAWCAD’s WAAS Receiver Test Tool (WRTT), WAAS Performance Analysis Tool (WPAT), and Global Positioning System Data Analysis System (GDAS) have been developed to verify the specification compliance of the SIS. This paper will describe in detail NAWCAD’s efforts to support the FAA in validating the WAAS SIS, including the equipment, methodologies, and results to date. Data will be collected in support of the FAA Satellite Operational Implementation Team (SOIT) – sponsored Operational Readiness Evaluation (ORE) of the WAAS. During this evaluation, static and flight data will be collected at various airports across the country for use by the FAA in evaluating the readiness of the WAAS prior to IOC. Flight data will be collected by NAWCAD using two airborne platforms, a Piper Cheyenne and a TH-57 (Bell Jet Ranger) so that both the fixed and rotary wing environment can be examined. Static and flight data will be evaluated using the WPAT.
Published in:	Proceedings of the 2000 National Technical Meeting of The Institute of Navigation January 26 - 28, 2000 Pacific Hotel Disneyland Anaheim, CA
Pages:	58 - 65
Cite this article:	Lardy, Todd R., "The WAAS Receiver and Signal in Space Validation Program," Proceedings of the 2000 National Technical Meeting of The Institute of Navigation, Anaheim, CA, January 2000, pp. 58-65.
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