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Assessment of Options for Extending the Life of the Hubble Space Telescope: Final Report
A more detailed discussion of the comparative mission risk between a human servicing mission and a robotic mission to HST is presented in Chapter 7.
FINDING: Space shuttle crews, in conjunction with their ground-based mission control teams, have consistently developed innovative procedures and techniques to bring about desired mission success when encountering unplanned for or unexpected contingencies on-orbit.
FINDING: The risk in the mission phase of a shuttle HST servicing mission is low.