Assessment of Options for Extending the Life of the Hubble Space Telescope Final Report (2005) / Chapter Skim
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Appendix C: Interim Report
Appendix C: Interim Report
Pages 116-125
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From page 116... ...
The additional information that you provided on NASA activities related to the shuttle return-to-flight program and robotic engineering in the broader context of long-term human space exploration was very useful, as was the extensive question-and-answer dialog that you enthusiastically engaged in with the committee. 1The committee roster is provided in enclosure A
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Much of Hub ble's extraordinary impact was foreseen when the telescope was being planned. It was predicted, for example, that the space telescope would reveal massive black holes at the centers of nearby galaxies, measure the size and age of the observable universe, probe far enough back in time to capture galaxies soon after their formation, and provide crucial keys to the evolution of chemical elements within stars.
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Compelling scientific returns will result from a servicing mission to the Hubble Space Telescope that accomplishes the scientific objectives of the originally planned NASA servicing mission SM-4.
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The committee finds the proposed robotic mission to be highly complex due to the inherent difficulties with supervised autonomy in the presence of time delays; the integration of vision and force feedback in six-degree-of-freedom assembly and disassembly tasks with high-degree-of-freedom, dexterous manipu lators; and the coordinated control of the high-inertia HRV8 with a long-reach robotic arm grappling with a high-inertia payload. Robotic emplacement of a deorbit module and replacement of instruments and subsystems on Hubble will require a rendezvous with a non-cooperative vehicle9 together with a human in a telerobotic loop that has a substantial (on the order of 2-second)
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RECOMMENDATION. At the same time that NASA is vigorously pursuing development of robotic servicing capabilities, and until the agency has completed a more comprehensive examination of the engineering and technology issues, including risk assessments related to both robotic and human servic ing options, NASA should take no actions that would preclude a space shuttle servicing mission to the Hubble Space Telescope.
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Hoover, Chair, Aeronautics and Space Engineering Board Joseph K Alexander, Director, Space Studies Board George Levin, Director, Aeronautics and Space Engineering Board 11NASA, Columbia Accident Investigation Board Report, Volume 1, August 2003, U.S.
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, Indian Harbour Beach, Florida STEPHEN M ROCK, Stanford University, Stanford, California JOSEPH ROTHENBERG, Universal Space Network, Darnestown, Maryland JOSEPH H
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Over its lifetime, HST has been an unprecedented scientific success, having earning extraordinary scien tific and public recognition for its contributions to all areas of astronomy. Prior to the accidental loss of the space shuttle Columbia and crew in February 2003 there had been plans for another shuttle servicing mission, designated SM-4, to replace aging spacecraft batteries and gyroscopes and to install two new science instruments on the telescope.
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a shuttle serving mission if one is deemed viable under task #1 and/or (b) a robotic servicing mission if one is deemed viable under task #2, is worth the risks involved.
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The review comments and draft manuscript remain confidential to protect the integrity of the delibera tive process. We wish to thank the following individuals for their review of this report: Roger Blandford, Stanford University, Wendy Freedman, Observatories of the Carnegie Institution, Takeo Kanade, Carnegie Mellon University, George Paulikas, The Aerospace Corporation (retired)
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