WFPC2 Filters after 16 Years on Orbit

Details WFPC2 Filters after 16 Years on Orbit WFPC2 Filters after 16 Years on Orbit

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010wfpc.rept....5l&link_type=abstract

Instrument Science Report WFPC2 2010-05, 15 pages

Computer Science

Hubble Space Telescope, Hst, Space Telescope Science Institute

Scientific paper

In a joint investigation by GSFC and STScI, the Selectable Optical Filter Assembly (SOFA) of WFPC2 was extracted and the filter wheels removed and examined for any on-orbit changes. The filters were inspected, photographed and scanned with a spectrophotometer at GSFC. The data have been analyzed at STScI with a view towards understanding how prolonged exposure to the HST space environment affected the filters and what the resultant impacts are to WFPC2 calibrations. We summarize our results from these post-SM4 laboratory studies, including a comparison of pre- to post-mission filter throughput measurements, evaluations of the UV filter red leaks, and assessment of the condition of the filter coatings.

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