DOI: 10.1029/2018JE005532
Scopus记录号: 2-s2.0-85047496173
论文题名: Radiative-Transfer Modeling of Spectra of Planetary Regoliths Using Cluster-Based Dense Packing Modifications
作者: Ito G. ; Mishchenko M.I. ; Glotch T.D.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期: 5 起始页码: 1203
结束页码: 1220
语种: 英语
英文关键词: dense packing
; radiative transfer
; regolith
; spectra
; static structure factor
; T-matrix
Scopus关键词: numerical method
; parameterization
; quantitative analysis
; radiative transfer
; regolith
; remote sensing
; spectrum
英文摘要: In remote sensing of planetary bodies, the development of analysis techniques that lead to quantitative interpretations of data sets has relatively been deficient compared to the wealth of acquired data, especially in the case of regoliths with particle sizes on the order of the probing wavelength. Radiative transfer theory has often been applied to the study of densely packed particulate media like planetary regoliths, but with difficulty; here we continue to improve theoretical modeling of spectra of densely packed particulate media. We use the superposition T-matrix method to compute the scattering properties of an elementary volume entering the radiative transfer equation by modeling it as a cluster of particles and thereby capture the near-field effects important for dense packing. Then, these scattering parameters are modified with the static structure factor correction to suppress the irrelevant far-field diffraction peak rendered by the T-matrix procedure. Using the corrected single-scattering parameters, reflectance (and emissivity) is computed via the invariant-imbedding solution to the scalar radiative transfer equation. We modeled the emissivity spectrum of the 3.3 μm particle size fraction of enstatite, representing a common regolith component, in the midinfrared (~5–50 μm). The use of the static structure factor correction coupled with the superposition T-matrix method produced better agreement with the corresponding laboratory spectrum than the sole use of the T-matrix method, particularly for volume scattering wavelengths (transparency features). This work demonstrates the importance of proper treatment of the packing effects when modeling semi-infinite densely packed particulate media using finite, cluster-based light scattering models. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114019
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geosciences, Stony Brook University, Stony Brook, NY, United States; NASA Goddard Institute for Space Studies, New York, NY, United States
Recommended Citation:
Ito G.,Mishchenko M.I.,Glotch T.D.. Radiative-Transfer Modeling of Spectra of Planetary Regoliths Using Cluster-Based Dense Packing Modifications[J]. Journal of Geophysical Research: Planets,2018-01-01,123(5)