Spectral modeling of meteorites at UV-vis-NIR wavelengths

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Abstract

We present a novel simulation framework for assessing the spectral properties of meteorite specimens. The framework utilizes a ray-optics code, which simulates light scattering by Gaussian-random-sphere particles large compared to the wavelength of the incident light and accounts for internal diffuse scatterers. The code uses incoherent input and computes phase matrices by utilizing incoherent scattering matrices. Reflectance spectra are modeled by introducing a combination of olivine, pyroxene, and iron, the most common materials present in meteorites that dominate their spectral features. The complex refractive indices of olivine and iron are obtained from existing databases. The refractive indices of pyroxene are derived using an optimization that utilizes our ray-optics code and the measured spectrum of the material. We demonstrate our approach by applying it on the measured meteorite reflectance spectra obtained with the University of Helsinki integrating-sphere UV-vis-NIR spectrometer. (C) 2017 Elsevier Ltd. All rights reserved.
Original languageEnglish
JournalJournal of Quantitative Spectroscopy & Radiative Transfer
Volume204
Pages (from-to)144-151
Number of pages8
ISSN0022-4073
DOIs
Publication statusPublished - Jan 2018
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 114 Physical sciences
  • 115 Astronomy, Space science

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