Accession Number : ADA187840

Title :   Navigation Recovery Block Design Description.

Descriptive Note : Final rept.,

Corporate Author : LOCKHEED-GEORGIA CO MARIETTA

Personal Author(s) : Hitts, E. F. ; Prater, S. A.

Report Date : MAR 1987

Pagination or Media Count : 84

Abstract : This report describes the recovery block approach to fault tolerant software and illustrates its application to a flight navigation problem. The navigation problem using VOR (Visual Omnirange) and DME (Distance Measuring Equipment) is developed, especially with regard to its software specification and implementation needs. Related aspects of the recovery block approach are reviewed, and Ada implemented source code is presented. Keywords: Acceptance test, Avionics, Digital flight systems, Error detection, Fault tolerant, Software, Navigation aids, Recovery block, Software structure, and System architecture.

Descriptors :   *COMPUTER PROGRAMS, *DISTANCE MEASURING EQUIPMENT, *FAULT TOLERANT COMPUTING, *NAVIGATIONAL AIDS, ACCEPTANCE TESTS, ARCHITECTURE, AVIONICS, CODING, COMPUTER PROGRAMMING, DETECTION, DIGITAL SYSTEMS, ERRORS, FLIGHT, NAVIGATION, RECOVERY, SOURCES, SPECIFICATIONS, STRUCTURES.

Subject Categories : Navigation and Guidance
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE