Hubble Space Telescope Servicing Mission 3A

Details Hubble Space Telescope Servicing Mission 3A Hubble Space Telescope Servicing Mission 3A

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999stin...0025317.&link_type=abstract

Technical Report, FS-199-10-033-GSFC

Other

Hubble Space Telescope, Imaging Techniques, Discovery (Orbiter), Space Missions, Spectrometers, Near Infrared Radiation, Cryogenics, Guidance Sensors

Scientific paper

The Hubble Space Telescope's purpose is to spend 20 years probing the farthest and faintest reaches of the cosmos. Crucial to fulfilling this objective is a series of on-orbit servicing missions. Hubble was placed in orbit on April 25, 1990, by the shuttle Discovery and subsequent servicing followed in December 1993 and February 1997. The third in the series of planned servicing missions for the Hubble Space Telescope was scheduled for June 2000. This third Servicing Mission has been separated into two flights. The first of these flights, Servicing Mission 3A, is scheduled for December 1999, and the second, Servicing Mission 3B, is scheduled for 2001. The fourth Servicing Mission is scheduled for 2003 with a "close-out" Mission in 2010. Three instruments are currently in active scientific use on Hubble - the Wide Field and Planetary Camera 2, the Space Telescope Imaging Spectrograph, and Fine Guidance Sensor I R, which has been designated as the prime FGS for astrometric science. Other instrument bays are occupied by the Near Infrared Camera and Multi-Object Spectrometer (NICMOS), which is now dormant due to the depletion of its solid nitrogen cryogen, the Faint Object Camera, which has been decommissioned, and the corrective optical device called COSTAR, which is no longer needed.

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