“…68 As late as 1978, about one-third of commercial spectrometers were still sold to government. 69 The AFCRL was a major early patron, but was joined by other significant research and development sites in America: the Jet Propulsion Laboratory in Houston, and the NASA Goddard Space Flight Center in Maryland. 70 The Aerospace Corporation, in Los Angeles, also began developing and purchasing Fourier spectrometers in the early 1960s, maintaining informal communications with John Strong and his former students at AFCRL.…”