Ground Based FTS and Infrared Array Spectroscopy

Abstract

In 1978 Kitt Peak National Observatory introduced a FTS of 1.8 m maximum path difference as a facility instrument for night-time astronomy at the 4 meter telescope. This instrument was decommissioned in 1995, after having recorded tens of thousands of spectra. This FTS is described by Hall et al. (1979). Note that the 4 meter FTS while similar in function is not the same instrument as the FTS at the Kitt Peak McMath-Pierce solar telescope. The McMath-Pierce FTS (Brault 1978, 1985) continues to be used extensively for both solar and laboratory work.