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Supersonic Retropropulsion on Robotic Mars Landers: Selected Design Trades

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dc.contributor.author Wolf, Aron A.
dc.contributor.author Noyes, Connor
dc.contributor.author Strauss, William
dc.contributor.author Benito, Joel
dc.contributor.author Lobbia, Marcus
dc.contributor.author McCann, John
dc.contributor.author Nakazono, Barry
dc.contributor.author Putnam, Zachary R.
dc.contributor.author Lorenz, Christopher G.
dc.date.accessioned 2020-05-26T15:57:28Z
dc.date.available 2020-05-26T15:57:28Z
dc.date.issued 2018-08-19
dc.identifier.citation AAS/AIAA Astrodynamics Specialist Conference, Snowbird, Utah, August 19 - 23, 2018 en_US
dc.identifier.clearanceno 18-4380
dc.identifier.uri http://hdl.handle.net/2014/48629
dc.description.abstract Many concepts for future robotic Mars lander missions require landing heavier payloads than those landed to date. Mars lander architectures to date have relied on a parachute to help slow the lander; however the effectiveness of a parachute in the thin Martian atmosphere is diminished with heavier payloads unless the diameter of the parachute is increased or it is deployed at a higher Mach number, both of which are significant technical challenges. In addition the parachute can be successfully deployed only within a specific Mach number and dynamic pressure range. Targeting the entry trajectory to hit this “Mach-Q box” imposes constraints on the entry ballistic coefficient, limiting it to ~ 150-200 kg/m^2. Eliminating the parachute from the design requires descent engine ignition at supersonic speeds (Supersonic Retropropulsion, or SRP). SRP increases the propellant requirement, but also allows entry ballistic coefficients of ~600 kg/m^2 or more, with the consequence of significantly increased entry mass and landed payload mass. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2018 en_US
dc.title Supersonic Retropropulsion on Robotic Mars Landers: Selected Design Trades en_US
dc.type Preprint en_US


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