PETRA: Spectrograph for investigating the solar atmosphere. Feasibility study of a spectrograph for solar observation in the visible spectral range

Physics – Optics

Scientific paper

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Feasibility Analysis, Solar Spectra, Space Shuttle Payloads, Spectrographs, Visible Spectrum, Directional Stability, Electronic Control, High Resolution, Microprocessors, Solar Atmosphere, Spaceborne Photography, Spaceborne Telescopes, Systems Integration

Scientific paper

A space qualified solar research spectrograph is described. The apparatus PETRA is a spectrograph for solar observation in the visible spectrum which is to be used on a space shuttle as an instrument in the focus of a solar optical telescope with a 125 cm aperture. With suitable equipment, the favorable optical conditions in space make possible spatial resolutions of 0.1 arc sec over a prolonged period of time. The prerequisites are high resolution mirror optics and mechanical stability.

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