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Design and on-orbit performance of the WINDII baffle system

WINDII is an imaging, field widened Michelson interferometer built by Canada and France for flight on NASA's Upper Atmosphere Research Satellite, which was launched September 12, 1991. Its primary purpose is to measure winds in the 80-300 km region of the atmosphere by measuring the Doppler shift of the airglow emissions. This paper discusses the design, testing and performance of the baffle system used for daytime observations.