UVCS Instrument Technical Status

  • General health of UVCS Instrument is very good. Instrument successfully completed recommissioning on 14 October 1998. No instrument problems have been attributed to the Mission Interruption.

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  • All instrument electronics were thoroughly exercised during recent recommissioning with no indications of degradation in function.

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  • Instrument Flight Software currently executing using original side-A software. No software patches have been implemented or are anticipated. All software checksum evaluations were successful upon recommissioning.

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  • Instrument Mechanisms remain fully functional. LYA Grating Drive must be operated through a commanded series of short motions to avoid sensor saturation. Cursory review of internal low-voltage bus characteristics indicate no impending mechanism operational problems.

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  • Instrument external and internal temperature distributions are nominal and comfortably within their allowable operating temperature ranges. All active thermal control devices remain fully operational.

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