Architecture of an FAA Certified TSO-C145c Precision Approach Receiver

R.A. Nayak, J.K. Ray

Abstract:	An aerospace GPS-SBAS receiver is characterized by extreme reliability, high accuracy and very good availability. Of these, reliability is the most important parameter. Misleading information from an aerospace receiver should be extremely improbable, because a misleading information can have hazardous or severe major consequences to the aircraft, passenger and flight crew of an aircraft. The receiver autonomous integrity monitoring has to prevent any erroneous information coming out of the receiver. The hardware reliability should also be extremely good such that a failure resulting misleading information is not probable more than 10e-7 during the approach. This has to be achieved through hardware design for reliability and confirmed by failure mode and effect analysis (FMEA), or fault tree analysis (FTA). A GPS-SBAS Precision Approach Receiver is developed for use in avionics application and approved by the FAA for use in en-route, terminal, LNAV, LNAV/VNAV and LP/LPV phases of flights as the primary means of navigation. The paper gives some details about the challenges of developing an aviation receiver and how those challenges are overcome through development of reliable hardware and robust software. The aviation receiver performance is defined in DO-229D standard, and the software and hardware development process guidelines are given in DO-178B and DO-254 standards. The paper explains how those guidelines were adhered to in the development of the aviation receiver.
Published in:	Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008) September 16 - 19, 2008 Savannah International Convention Center Savannah, GA
Pages:	1948 - 1954
Cite this article:	Nayak, R.A., Ray, J.K., "Architecture of an FAA Certified TSO-C145c Precision Approach Receiver," Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008), Savannah, GA, September 2008, pp. 1948-1954.
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