Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL078602 |
Photometric Modeling and VIS-IR Albedo Maps of Tethys From Cassini-VIMS | |
Filacchione, G.1; 39;Aversa, E.2 | |
2018-07-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:13页码:6400-6407 |
文章类型 | Article |
语种 | 英语 |
国家 | Italy; USA; Germany |
英文摘要 | 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, 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 mu m) and five infrared (1.046, 1.540, 1.822, 2.050, and 2.200 mu m) wavelengths and rendered in cylindrical projection with a 0.5 degrees x 0.5 degrees 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-mu m spectral slopes and the water ice 2.050-mu m 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. Plain Language Summary Visible and infrared albedo maps of Tethys surface are derived from Cassini-Visual and Infrared Mapping Spectrometer data set by applying a photometric correction able to remove illumination and viewing effects from the data. This processing allows to build spectral indicator maps able to trace composition changes in terms of visible colors and water ice band depth across the surface. We focus our analysis on specific geologic features, including impact craters and low-albedo areas, where exogenic processes are occurring. We report how E-ring particles, magnetospheric and cold plasma particles bombardment, alter the surface of Tethys. |
英文关键词 | photometric correction VIS-IR albedo maps spectral slopes maps water ice band depth map Tethys |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439784300009 |
WOS关键词 | SATURNS ICY SATELLITES ; MIMAS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/25664 |
专题 | 气候变化 |
作者单位 | 1.INAF, Ist Astrofis & Planetol Spaziali, Rome, Italy; 2.CALTECH, Jet Prop Lab, Pasadena, CA USA; 3.Planetary Sci Inst, Tucson, AZ USA; 4.German Aerosp Ctr DLR, Berlin, Germany; 5.Italian Space Agcy ASI, Rome, Italy |
推荐引用方式 GB/T 7714 | Filacchione, G.,39;Aversa, E.. Photometric Modeling and VIS-IR Albedo Maps of Tethys From Cassini-VIMS[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(13):6400-6407. |
APA | Filacchione, G.,&39;Aversa, E..(2018).Photometric Modeling and VIS-IR Albedo Maps of Tethys From Cassini-VIMS.GEOPHYSICAL RESEARCH LETTERS,45(13),6400-6407. |
MLA | Filacchione, G.,et al."Photometric Modeling and VIS-IR Albedo Maps of Tethys From Cassini-VIMS".GEOPHYSICAL RESEARCH LETTERS 45.13(2018):6400-6407. |
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