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COS System Testing and Delivery Updates

Latest updates on formal delivery to HSTP, N2 purge alignment, throughputs testing, and upcoming testing rounds. Includes information on thermal-vac data processing, functionality verification, and optic mechanism drift. STScI ensures semi-annual functional testing post-delivery.

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COS System Testing and Delivery Updates

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  1. COS SI Testing and Delivery • SI formally delivered to HSTP in May • N2 purge alignment and NUV throughput testing pre- and post-ship • No effective alignment changes • Stored in clean room at GSFC • GSFC assumes responsibility for semi-annual functional testing after delivery • Next round of testing: late Nov 2004 • All throughput data archived at STScI

  2. STScI COS Effort • Thermal-Vac Data Processing • Re-ingested T-V data with updated keywords • Initial Verification of CALCOS functionality for flatfielding, spectrum extraction, spectrum combination • Keyword dictionary prepared • Completed TIR on Cumulative Exposure Image (FUV/NUV) and Pulse-height map (FUV) • Completed ISR on high voltage transients in FUV detector and operational responses - Friedman (STScI), Brownsberger(IDT) • FASTEX Standards Paper (Bohlin, Leitherer) in progress • Deferred all SMGT, SMOV4, User Support effort

  3. COS SI Issues • Optic Select Mechanism drift characterized in testing at Ball and CU • Both thermal and mechanical components are present • No hardware amelioration planned • Must be corrected to achieve design resolution in many cases • Rely on operational correction procedure • Applies to time-tag only; requires lamp exposures during science • Algorithm described and procedures outlined • Requires extensive STScI ground system work to implement • Knowledge and expertise is presently available at STScI • Full requirements development during FY05

  4. Additional COS Pictures

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