It is the work of commercial enterprises specializing in scientific instrumentation — Googling «ir radiometry company» returned nearly a million hits as of writing. (hubpages.com)
The Physikalisch - Technische Bundesanstalt (PTB) has now developed a mathematical procedure which yields clearly improved results and can be applied in numerous fields of radiometry and photometry. (sciencedaily.com)
One was from the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument riding on NASA's TIMED satellite. (sciencedaily.com)