Auroral and airglow Fabry–Perot spectrometer

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Abstract
A microcomputer-controlled and piezoelectrically scanned Fabry–Perot spectrometer capable of being transported to remote field sites has been constructed. The Fabry–Perot has a 70-mm aperture and has a provision for computer control of the cavity drift. The instrument has been operated at resolutions from 0.06–1.5 Å in making high-speed observations of the aurora from 7500–8500 Å. A separate filter-wheel photometer section provides information on other auroral and airglow emissions such as N+2(4278) and OI(6300). The apparatus is portable and has been operated at Poker Flat, Alaska and Churchill, Canada.