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Executive Summary
Pages 1-3

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From page 1...
... RISK MANAGEMENT STRATEGY A National Aeronautics and Space Administration (NASA) guideline states that the risk of critical failure (i.e., penetration of the orbiter that results in the loss of vehicle or loss of life)
From page 2...
... Because the data are limited and the population of debris smaller than about 5 mm in diameter varies widely, ORDEM96's predictions of debris fluxes for individual shuttle missions may be highly inaccurate. To predict the short-term hazard to the orbiter from orbital debris more accurately, NASA should expand its data gathering and modeling efforts to better understand the sources (e.g., solid rocket motors and debris wakes)
From page 3...
... RISK MITIGATION The space shuttle program has developed operational procedures, and is about to implement hardware modifications, to improve the survivability of the shuttle orbiter and crew in the face of the meteoroid and orbital debris hazard. In the future, however, when the orbiter is supporting the International Space Station, many of the operational techniques developed to improve the orbiter's survivability will not be employed because the shuttle's freedom to maneuver and control its attitude will be constrained to satisfy requirements for space station power, thermal conditions, and attitude control.

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