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Photometric Modeling and VIS-IR Albedo Maps of Dione From Cassini-VIMS

Filacchione, G. and Ciarniello, M. and D'Aversa, E. and Capaccioni, F. and Cerroni, P. and Buratti, B.J. and Clark, R. N. and Stephan, Katrin and Plainaki, C. (2018) Photometric Modeling and VIS-IR Albedo Maps of Dione From Cassini-VIMS. Geophysical Research Letters, 45 (5), pp. 2184-2192. Wiley. DOI: 10.1002/2017GL076869 ISSN 0094-8276

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1002/2017GL076869

Abstract

We report about visible and infrared albedo maps and spectral indicators of Dione’s surface derived from the complete Visual and Infrared Mapping Spectrometer (VIMS) data set acquired between 2004 and 2017 during the Cassini tour in Saturn’s system. Maps are derived by applying a photometric correction necessary to disentangle the intrinsic albedo of the surface from illumination and viewing geometry occurring at the time of the observation. The photometric correction is based on the Shkuratov et al. (2011, https://doi.org/10.1016/j.pss.2011.06.011) method which yields values of the surface equigonal albedo. Dione’s surface albedo maps are rendered at five visible (VIS: 0.35, 0.44, 0.55, 0.7, and 0.95 μm) and five infrared (IR: 1.046, 1.540, 1.822, 2.050, and 2.200 μm) wavelengths in cylindrical projection with a 0.5∘ × 0.5∘ angular resolution in latitude and longitude, corresponding to a spatial resolution of 4.5 km/bin. Apart from visible and infrared albedo maps, we report about the distribution of the two visible spectral slopes (0.35–0.55 and 0.55–0.95 μm) and water ice 2.050 μm band depth computed after having applied the photometric correction. The derived spectral indicators are employed to trace Dione’s composition variability on both global and local scales allowing to study the dichotomy between the bright-leading and dark-trailing hemispheres, the distribution of fresh material on the impact craters and surrounding ejecta, and the resurfacing of the bright material within the chasmata caused by tectonism.

Item URL in elib:https://elib.dlr.de/125319/
Document Type:Article
Title:Photometric Modeling and VIS-IR Albedo Maps of Dione From Cassini-VIMS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Filacchione, G.INAF-IASF, Rome, ItalyUNSPECIFIED
Ciarniello, M.INAF-IASF, ItalyUNSPECIFIED
D'Aversa, E.INAF-IFSI, Rome, ItalyUNSPECIFIED
Capaccioni, F.INAF-IASF, italyUNSPECIFIED
Cerroni, P.INAF-IASF, Rome, ItalyUNSPECIFIED
Buratti, B.J.Jet Propulsion Laboratory, Pasadena, CAUNSPECIFIED
Clark, R. N.US Geological Survey, Denver, CO, USAUNSPECIFIED
Stephan, KatrinKatrin.Stephan (at) dlr.deUNSPECIFIED
Plainaki, C.INAF-IAPS Istituto di Astrofisica e Planetologia Spaziali, Rome, ItalyUNSPECIFIED
Date:2018
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:45
DOI :10.1002/2017GL076869
Page Range:pp. 2184-2192
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:Cassini, VIMS, Dione, Photometrie
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Stephan, Dr.rer.nat. Katrin
Deposited On:19 Dec 2018 08:03
Last Modified:19 Dec 2018 08:03

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