JPL Technical Report Server

Probabilistic round trip contamination analysis of a Mars sample acquisition and handling process using Markovian decompositions

Show simple item record

dc.contributor.author Hudson, Nicolas
dc.contributor.author Lin, Ying
dc.contributor.author Barengoltz, Jack
dc.date.accessioned 2015-05-14T23:25:45Z
dc.date.available 2015-05-14T23:25:45Z
dc.date.issued 2010-03-06
dc.identifier.citation 2010 IEEE Aerospace Conference, Big Sky, Montana, March 6-13, 2010 en_US
dc.identifier.clearanceno 10-0482
dc.identifier.uri http://hdl.handle.net/2014/45208
dc.description.abstract A method for evaluating the probability of a Viable Earth Microorganism (VEM) contaminating a sample during the sample acquisition and handling (SAH) process of a potential future Mars Sample Return mission is developed. A scenario where multiple core samples would be acquired using a rotary percussive coring tool, deployed from an arm on a MER class rover is analyzed. The analysis is conducted in a structured way by decomposing sample acquisition and handling process into a series of discrete time steps, and breaking the physical system into a set of relevant components. At each discrete time step, two key functions are defined: The probability of a VEM being released from each component, and the transport matrix, which represents the probability of VEM transport from one component to another. By defining the expected the number of VEMs on each component at the start of the sampling process, these decompositions allow the expected number of VEMs on each component at each sampling step to be represented as a Markov chain. This formalism provides a rigorous mathematical framework in which to analyze the probability of a VEM entering the sample chain, as well as making the analysis tractable by breaking the process down into small analyzable steps. 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, 2010 en_US
dc.title Probabilistic round trip contamination analysis of a Mars sample acquisition and handling process using Markovian decompositions en_US
dc.type Preprint en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search


Browse

My Account