elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Photometric Modeling and VIS-IR Albedo Maps of Tethys 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 Tethys From Cassini-VIMS. Geophysical Research Letters, 45 (13), pp. 6400-6407. Wiley. DOI: 10.1029/2018GL078602 ISSN 0094-8276

[img] PDF
879kB

Official URL: https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GL078602

Abstract

We report about the derivation of visible (VIS) and infrared (IR) albedo maps and spectral indicators of Saturn's satellite Tethys from the complete Cassini‐Visual and Infrared Mapping Spectrometer (VIMS) data set. The application of a photometric correction is necessary to remove illumination and viewing effects from the I/F spectra, to compute spectral albedo and to correctly associate spectral variations to changes in composition or physical properties of the surface. In this work we are adopting the photometric correction proposed by Shkuratov et al. (2011, https://doi.org/10.1016/j.pss.2011.06.011) to derive albedo maps of Tethys from disk‐resolved Cassini‐VIMS data. After having applied a similar methodology to Dione's data (Filacchione et al., 2018, https://doi.org/10.1002/2017GL076869), we present here the results achieved for Tethys: surface albedo maps and photometric parameters are computed at five visible (0.35, 0.44, 0.55, 0.70, and 0.95 μm) and five infrared (1.046, 1.540, 1.822, 2.050, and 2.200 μm) wavelengths and rendered in cylindrical projection with a 0.5° × 0.5° angular resolution in latitude and longitude, corresponding to a highest spatial resolution of 4.7 km/bin. The 0.35‐ to 0.55‐ and 0.55‐ to 0.95‐μm spectral slopes and the water ice 2.050‐μm band depth maps are computed after having applied the photometric correction, in order to trace the leading‐trailing hemisphere dichotomy, to constrain the shape of the equatorial lens generated by the bombardment of high‐energy magnetospheric electrons on the leading hemisphere, and to observe the stronger water ice band depth and reddening within the floors of Odysseus and Penelope impact craters.

Item URL in elib:https://elib.dlr.de/125312/
Document Type:Article
Title:Photometric Modeling and VIS-IR Albedo Maps of Tethys 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, 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:No
Open Access:No
In DOAJ:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:45
DOI :10.1029/2018GL078602
Page Range:pp. 6400-6407
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:Cassini, VIMS, Tethys, 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 07:57
Last Modified:19 Dec 2018 07:57

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.