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What is the speed of setup?

April 26, 2017Setup speed

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What is the speed of setup?

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The instrument specific setup to begin an IFIRS observation consists of: • Pure FTS mode • Select beam splitter • Command optical path difference • Dispersed FTS mode • Select beam splitter • Command optical path difference • Select prism • Configure focal plane mask (micro-mirror array) The major mechanisms (beam splitter & prism) take < 100 s to select. The time to acquire and stabilize a given optical path difference is < 2 s. Precise absolute pointing is not required for the pure FTS mode --- only accurate tracking during a single exposure (t = 100-1000 s) is needed.