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Statistical Analysis of a Large Sample Size Pyroshock Test Data Set Including Post Flight Data AssessmentThe Earth Observing System (EOS) Terra spacecraft was launched on an Atlas IIAS launch vehicle on its mission to observe planet Earth in late 1999. Prior to launch, the new design of the spacecraft's pyroshock separation system was characterized by a series of 13 separation ground tests. The analysis methods used to evaluate this unusually large amount of shock data will be discussed in this paper, with particular emphasis on population distributions and finding statistically significant families of data, leading to an overall shock separation interface level. The wealth of ground test data also allowed a derivation of a Mission Assurance level for the flight. All of the flight shock measurements were below the EOS Terra Mission Assurance level thus contributing to the overall success of the EOS Terra mission. The effectiveness of the statistical methodology for characterizing the shock interface level and for developing a flight Mission Assurance level from a large sample size of shock data is demonstrated in this paper.
Document ID
20100029588
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Hughes, William O. (NASA Glenn Research Center Cleveland, OH, United States)
McNelis, Anne M. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 25, 2013
Publication Date
July 1, 2010
Subject Category
Launch Vehicles And Launch Operations
Report/Patent Number
NASA/TM-1998-206621/REV1
E-11057-1
Meeting Information
Meeting: 80th Shock and Vibration Symposium
Location: San Diego, CA
Country: United States
Start Date: October 25, 2009
End Date: October 29, 2009
Sponsors: Shock and Vibration Information Center (Defense)
Funding Number(s)
WBS: WBS 432938.11.01.03.01.02.02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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