A Comprehensive BRF Model for SpectralonⓇ and Application to Hyperspectral Field Imagery

Abstract

We present a comprehensive hyperspectral bidirectional reflectance model for a pristine optical-grade white Spectralon® panel with full azimuthal coverage, a wide range of view zenith angles and incident illumination zenith angles, throughout ultraviolet, visible, near infrared and shortwave infrared wavelengths (350-2500 nm). Measurements were acquired using the Goniometer of the Rochester Institute of Technology-Two, which incorporates Analytical Spectral Device FieldSpec FR4 spectroradiometers. Residual plots show that the empirical model is accurate to within 1-2% reflectance within most of the observing hemisphere. We demonstrate an application of the Spectralon® panel model to hyperspectral imagery acquired during a field experiment at the RIT Tait Preserve where a pair of field Spectralon® panels was imaged from various view geometries from both drone and mast-mounted hyperspectral imaging systems.