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Life Extension Activities for the Hubble Space TelescopeWith the cancellation of the Hubble Space Telescope (HST) Servicing Mission 4 (SM4), the HST Project will face numerous challenges to keep the Telescope operating during the remainder of the decade. As part of the SM4, the HST Project had planned to install various upgrades to the Telescope including the installation of new batteries and new rate integrating gyros. Without these upgrades, reliability analysis indicates that the spacecraft will lose the capability to conduct science operations later this decade. The HST team will be severely challenged to maximize the Telescope's remaining operational lifetime, while still trying to maximize - its science output and quality. Two of the biggest areas of concern are the age and condition of the batteries and gyros. Together they offer the largest potential extension in Telescope lifetime and present the biggest challenges to the HST team. The six Ni-H batteries on HST are the original batteries from launch. With fourteen years of operational life, these batteries have collectively lasted longer than any other comparable mission. Yet as with all batteries, their capacity has been declining. Engineers are examining various methods to prolong the life of these mission critical batteries, and retard the rate of degradation. This paper will focus on these and other efforts to prolong the life of the HST, thus enabling it to remain a world-class observatory for as long as possible.
Document ID
20040081414
Document Type
Preprint (Draft being sent to journal)
Authors
Walyus, Keith D.
Pepe, Joyce A. K.
Prior, Michael
Date Acquired
August 21, 2013
Publication Date
March 1, 2004
Subject Category
Astronomy
Report/Patent Number
SPIE-5488-128
Meeting Information
Astronomical Telescopes and Instrumentation 2004(Glasgow, Scotland)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.