https://www.nist.gov/publications/measurements-absolute-si-traceable-lunar-irradiance-airborne-lunar-spectral-irradiance
The Airborne LUnar Spectral Irradiance (Air-LUSI) instrument is designed to make low uncertainty, hyperspectral measurements of the lunar spectral irradiance fr
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https://www.nist.gov/publications/large-area-irradiance-mode-spectral-response-measurements-solar-cells-light-emitting
An irradiance-mode absolute differential spectral response measurement system based on a light emitting diode (LED) array is described.
solar cellslargeareairradiancemode