Other
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999xmm..pres...56.&link_type=abstract
XMM Press Release PR 56-1999
Other
Scientific paper
During the flight, Nicollier became the first European astronaut to walk in space from the Shuttle as he worked with British-born astronaut Michael Foale on a six-hour stint in space. On the second of three EVA days, Nicollier and Foale successfully replaced the telescope's computer, dramatically increasing Hubble's capabilities and significantly cutting operational costs.
Clervoy, the mission flight engineer, proved his expertise as the main operator of the Shuttle's robotic arm providing the platform used during the space walks to manoeuvre astronauts around the telescope in the orbiter's payload bay.
The mission's prime objective was to replace the telescope's six gyroscopes (three of which must be working to meet the telescope's very precise pointing requirements). Since November, the telescope has not been operating, after a fourth gyroscope failed. The telescope will be tested over the next two or three weeks.
As well as replacing all the telescope's gyros, the crew also replaced other equipment on Hubble that had either degraded in the harsh space environment or could be replaced with more up-to-date technology.
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