Photometric modelling for laboratory measurements of dark volcanic sand

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http://hdl.handle.net/10138/229639

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Wilkman , O , Gritsevich , M , Zubko , N , Peltoniemi , J I & Muinonen , K 2016 , ' Photometric modelling for laboratory measurements of dark volcanic sand ' , Journal of Quantitative Spectroscopy & Radiative Transfer , vol. 185 , no. 1 , pp. 37-47 . https://doi.org/10.1016/j.jqsrt.2016.08.013

Title: Photometric modelling for laboratory measurements of dark volcanic sand
Author: Wilkman, Olli; Gritsevich, Maria; Zubko, Nataliya; Peltoniemi, Jouni I.; Muinonen, Karri
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Finnish Geospatial Research Institute FGI
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Date: 2016-12
Language: eng
Number of pages: 11
Belongs to series: Journal of Quantitative Spectroscopy & Radiative Transfer
ISSN: 0022-4073
URI: http://hdl.handle.net/10138/229639
Abstract: We have performed laboratory measurements of the bidirectional reflectance factor (BRF) of a sample of dark volcanic sand. The measurements were carried out with three different treatments of the sample to produce different porosity and roughness characteristics. We model the measured BRF with a semi-numerical scattering model for particulate media, meant especially for dark planetary regoliths. We compare the BRF in two different spectral bands, 500-600 nm and 800-900 nm. The particulate medium (PM). scattering model is found to fit the measured data well, with a phase function representing the differences between the spectral bands. The interpretation of the physical parameters of the PM model is qualitatively sound, but remains somewhat uncertain due in part to the difficulty of characterizing the measured sample. (C) 2016 Elsevier Ltd. All rights reserved.
Subject: Photometry
Regolith
Shadowing
REFLECTANCE FACTOR MEASUREMENTS
SURFACES
ANALOGS
SNOW
DENSITY
BODIES
115 Astronomy, Space science
114 Physical sciences
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