title: A dual-spectrometer approach to reflectance measurements under sub-optimal sky conditions.
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.
authors.affiliation: Naval Research Laboratory, Remote Sensing Division, 4555 Overlook Ave., SW, Washington, D.C. 20375, USA. charles.bachmann@nrl.navy.mil
authors.forename: Charles M
authors.initials: CM
authors.lastname: Bachmann
authors.forename: Marcos J
authors.initials: MJ
authors.lastname: Montes
authors.forename: Christopher E
authors.initials: CE
authors.lastname: Parrish
authors.forename: Robert A
authors.initials: RA
authors.lastname: Fusina
authors.forename: C Reid
authors.initials: CR
authors.lastname: Nichols
authors.forename: Rong-Rong
authors.initials: RR
authors.lastname: Li
authors.forename: Eric
authors.initials: E
authors.lastname: Hallenborg
authors.forename: Christopher A
authors.initials: CA
authors.lastname: Jones
authors.forename: Krista
authors.initials: K
authors.lastname: Lee
authors.forename: Jon
authors.initials: J
authors.lastname: Sellars
authors.forename: Stephen A
authors.initials: SA
authors.lastname: White
authors.forename: John C
authors.initials: JC
authors.lastname: Fry