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Atmospheric Risk Assessment for the Mars Science Laboratory Entry, Descent, and Landing SystemIn 2012, the Mars Science Laboratory (MSL) mission will pioneer the next generation of robotic Entry, Descent, and Landing (EDL) systems, by delivering the largest and most capable rover to date to the surface of Mars. As with previous Mars landers, atmospheric conditions during entry, descent, and landing directly impact the performance of MSL's EDL system. While the vehicle's novel guided entry system allows it to "fly out" a range of atmospheric uncertainties, its trajectory through the atmosphere creates a variety of atmospheric sensitivities not present on previous Mars entry systems and landers. Given the mission's stringent landing capability requirements, understanding the atmosphere state and spacecraft sensitivities takes on heightened importance. MSL's guided entry trajectory differs significantly from recent Mars landers and includes events that generate different atmospheric sensitivities than past missions. The existence of these sensitivities and general advancement in the state of Mars atmospheric knowledge has led the MSL team to employ new atmosphere modeling techniques in addition to past practices. A joint EDL engineering and Mars atmosphere science and modeling team has been created to identify the key system sensitivities, gather available atmospheric data sets, develop relevant atmosphere models, and formulate methods to integrate atmosphere information into EDL performance assessments. The team consists of EDL engineers, project science staff, and Mars atmospheric scientists from a variety of institutions. This paper provides an overview of the system performance sensitivities that have driven the atmosphere modeling approach, discusses the atmosphere data sets and models employed by the team as a result of the identified sensitivities, and introduces the tools used to translate atmospheric knowledge into quantitative EDL performance assessments.
Document ID
20150012002
Document Type
Conference Paper
Authors
Chen, Allen (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Vasavada, Ashwin (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Cianciolo, Alicia (NASA Langley Research Center Hampton, VA, United States)
Barnes, Jeff (Oregon State Univ. Corvallis, OR, United States)
Tyler, Dan (Oregon State Univ. Corvallis, OR, United States)
Hinson, David (Search for Extraterrestrial Intelligence Inst. Mountain View, CA, United States)
Lewis, Stephen (Open Univ. Milton Keynes, United Kingdom)
Date Acquired
July 1, 2015
Publication Date
March 6, 2010
Subject Category
Astrodynamics
Lunar and Planetary Science and Exploration
Meeting Information
2010 IEEE Aerospace Conference(Big Sky, MT)
Distribution Limits
Public
Copyright
Other
Keywords
EDL
MSL
Atmosphere