A dual-spectrometer approach to reflectance measurements under sub-optimal sky conditions

TitleA dual-spectrometer approach to reflectance measurements under sub-optimal sky conditions
Publication TypeJournal Article
Year2012
AuthorsBachmann, Charles M., Montes, Marcos J., Parrish, Christopher E., Fusina, Robert A., Nichols, Reid C., Li, Rong-Rong, Hallenborg, Eric, Jones, Christopher A., Lee, Krista, Sellars, Jon, White, Stephen A., and Fry, John C.
JournalOptics Express
Volume20
Date PublishedIn press
PublisherThe Optical Society (OSA)
KeywordsSpectrometers and spectroscopic instrumentation, Spectroscopy

Abstract: This paper presents a practical method for the development of spectral reflectance libraries under sub-optimal sky conditions.  Although there are commercially available spectrometers which simultaneously measure both downwelling and upwelling radiance to mitigate the impact of sub-optimal sky conditions, these spectrometers only record in the visible and near infra-red.  There are presently no commercially available spectrometers with this capability that can record the visible through short-wave infra-red.  This paper presents a practical method of recording and processing data using coordinated measurements from two full-range spectrometers and discusses potential pitfalls and solutions required to achieve accurate reflectance spectra.  Results demonstrate that high-quality spectral reflectance libraries can be developed with this approach.

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