White-light stray light test of the SOHO UVCS

Details White-light stray light test of the SOHO UVCS White-light stray light test of the SOHO UVCS

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3443...50l&link_type=abstract

Proc. SPIE Vol. 3443, p. 50-60, X-Ray and Ultraviolet Spectroscopy and Polarimetry II, Silvano Fineschi; Ed.

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

During the late stages of integration at MATRA-Marconi in Toulouse, France of the Ultraviolet Coronagraph Spectrometer (UVCS) for the joint NASA/ESA (European Space Agency) Solar and Heliospheric Observatory (SOHO), project management for the International Solar and Terrestrial Physics Project (ISTP) at Goddard Space Flight Center (GSFC) became concerned that the instrument's elaborate stray light rejection system had not been tested and might possibly be misaligned such that the instrument could not deliver promised scientific returns. A white light stray light test, which would place an upper bound on UVCS's stray light rejection capability, was commissioned, conceived, and carried out. This upper bound value would be indicative of the weakest coronal features the spectrometer would be capable of discerning. The test was rapidly developed at GSFC, in parallel with spacecraft integration, in coordination with science team members from Harvard- Smithsonian Center for Astrophysics (CFA) and was carried out at MATRA in late February 1995. The outcome of this test helped justify later impact to integration schedule to conduct similar much needed testing with visible and far ultraviolet light at CFA in a facility specifically designed to perform such tests.

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