TIMED Orbital Science Mission PRA Integration
This paper discusses the PRA (Probabilistic Risk Assessment) development for the NASA TIMED (Thermosphère, Ionosphere, Mesosphere Energetics and Dynamics) orbital science mission. A methodology is introduced for developing a mission PRA for a low complexity mission with limited assessment resources. For this activity, one overall PRA model set is produced based on previously completed instrument analyses as well as key additions including development of a top-level event-tree model, inclusion spacecraft deployment models, and logic and quantification improvements. Results include top cut sets and probabilities for full and minimum mission success.
KeywordsFault Tree Probabilistic Risk Assessment Time Mission Orbit Insertion Mission Success
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- 1.Program and Project Management Processes and Requirements, NASA Procedures and Guidelines NPG 7120.5B, 2002Google Scholar
- 2.Stamatelatos M. Probabilistic Risk Assessment Procedures Guide for NASA Managers and Practitioners Version 1.1. NASA Office of Safety and Mission Assurance, 2002Google Scholar
- 3.Probabilistic Risk Assessment (PRA) Guidelines for NASA Programs and Projects, NASA Procedures and Guidelines NPG.8705.XX (draft)Google Scholar
- 4.Project communication from David Kusnierkiewicz, 12 December 2000Google Scholar
- 5.Systems Analysis Programs for Hands-On Integrated Reliability Evaluations (SAPHIRE) Version 6.74. Idaho National Engineering and Environmental Laboratory, http://saphire.inel.gov/Google Scholar
- 6.Applied Physics Laboratory Press Release. Global Study of Atmospheric Frontier Continues — NASA’s TIMED Mission Extended for Future Studies. October 1, 2003Google Scholar