Abstract

A Michelson interferometer has been built for use with the 91-cm telescope on NASA’s Gerard P. Kuiper Airborne Observatory primarily to measure ir line emission from H ii regions. Operation is in the rapid scan mode, and the achievable resolution is 0.02 cm−1 in the wavelength range from 10 μm to around 300 μm. A minicomputer is used to provide on-line spectrum displays and to control and monitor the instrument performance. The design and use of the instrument is discussed, and a comparison is made between the theoretical performance and that actually achieved on the first flights when measurements of line emission from the Orion nebula and from the atmosphere were made.

© 1977 Optical Society of America

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