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Mars Exploration Rovers landing dispersion analysis

Show simple item record Knocke, Philip C. Wawrzyniak, Geoffrey G. Kennedy, Brian M. Parker, Timothy J. Golombek, Matthew P. Duxbury, Thomas C. Kass, David M. Desai, Prasun N. en_US 2006-02-07T23:24:05Z 2006-02-07T23:24:05Z 2004-08-16
dc.identifier.citation AIAA/AAS Astrodynamics Specialist Conference and Exhibit en
dc.identifier.clearanceno 04-0861
dc.description.abstract Landing dispersion estimates for the Mars Exploration Rover missions were key elements in the site targeting process and in the evaluation of landing risk. This paper addresses the process and results of the landing dispersion analyses performed for both Spirit and Opportunity. The several contributors to landing dispersions (navigation and atmospheric uncertainties, spacecraft modeling, winds, and margins) are discussed, as are the analysis tools used. The JPL MarsLS program, a MATLAB-based landing dispersion visualization and statistical analysis tool, was used to calculate the probability of landing within hazardous areas. By convolving this with the probability of landing within flight system limits (in-spec landing) for each hazard area, a single overall measure of landing risk was calculated for each landing ellipse. In-spec probability contours were also generated, allowing a more synoptic view of site risks, illustrating the sensitivity to changes in landing location, and quantifying the possible consequences of anomalies such as incomplete maneuvers. Data and products required to support these analyses are described, including the landing footprints calculated by NASA Langley's POST program and the JPL AEPL program, cartographically registered base maps and hazard maps, and flight system estimates of in-spec landing probabilities for each hazard terrain type. Various factors encountered during operations, including evolving navigation estimates and changing atmospheric models, are discussed and final landing points are compared with approach estimates. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 3720120 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004 en
dc.subject Mars Exploration Rovers en
dc.subject landing dispersions en
dc.title Mars Exploration Rovers landing dispersion analysis en
dc.type Preprint en

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