STUDY OF FACTORS AFFECTING SYSTEM RELIABILITY
Abstract
AD- !(! N3 AD-272 190Div. 12 U (TISTA/SEB)ARINC Research Corp., Washington, D. C. EVALUATION OF TRANSIT SATELLITE RELIABILITY, by J. A McGill, H. Dagen, and C. L. Noelcke. 26 July 61, 80p. incl. illus. tables, refs. (Rept. no. 3; Pub. no. 173-2-252) (Contract SD-77, continuation of Contract SD-50-3; In cooperation with Applied Physics Lab., Johns Hopkins University) Unclassified report DESCRIPTORS: (*Satellite vehicles, Navigation, Doppler navigation, Doppler systems, Radio signals, Command systems, Radio transmission, Telemetering data, Telemetering transmitters, Reliability, Life expectancy, Mathematical analysis, Statistical analysis, Mathematical prediction.) Identifiers: Transit, Ephemeris. Reliability evaluations are presented for the TRANSIT NAV-3B system, its major subsystems, and of the NAV-4A system. As the NAV-4A design information available to ARINC is limited, the prediction for this system configuration is tentative and must be regarded as a ball-park estimate. Reliability functions were derived and computed for three task configurations of the NAV-3B system, corresponding to 3 functional situations: (1) doppler signal task, (2) operational task (doppler signalling plus transmission of ephemeris information), and (3) telemetering task (transmission of engineering-evaluation data). For the operational task, reliability functions were computed for 3 levels of system performance, corresponding to the probability of obtaining at least 1, at least 8, or the entire 16 words from the Memory Subsystem. Three NAV-4A task configurations were also considered: (1) the X- and Y-megacycle doppler signalling task, (2) the 54- and 324-mc doppler signalling task, and (3) the operational task. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 17, 1961
- Accession Number
- AD0272191
Entities
People
- E.r. Jervis
Organizations
- ARINC