Global-scale surface spectral variations on Titan seen from Cassini/VIMS

被引：102

作者：

Barnes, Jason W.

Brown, Robert H.

Soderblom, Laurence

Buratti, Bonnie J.

Sotin, Christophe

Rodriguez, Sebastien

Le Mouelic, Stephane

Baines, Kevin H.

Clark, Roger

Nicholson, Phil

机构：

[1] Univ Arizona, Dept Planetary Sci, Lunar & Planetary Lab, Tucson, AZ 85721 USA

[2] US Geol Survey, Flagstaff, AZ 86001 USA

[3] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[4] Fac Sci, Lab Planetol & Geodynam, F-44072 Nantes 3, France

[5] US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA

[6] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA

来源：

ICARUS | 2007年 / 186卷 / 01期

关键词：

Titan;

D O I：

10.1016/j.icarus.2006.08.021

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present global-scale maps of Titan from the Visual and Infrared Mapping Spectrometer (VIMS) instrument on Cassini. We map at 64 near-infrared wavelengths simultaneously, covering the atmospheric windows at 0.94, 1.08, 1.28, 1.6, 2.0, 2.8, and 5 mu m with a typical resolution of 50 km/pixel or a typical total integration time of I s. Our maps have five to ten times the resolution of ground-based maps, better spectral resolution across most windows, coverage in multiple atmospheric windows, and represent the first spatially resolved maps of Titan at 5 mu m. The VIMS maps provide context and surface spectral information in support of other Cassini instruments. We note a strong latitudinal dependence in the spectral character of Titan's surface, and partition the surface into 9 spectral units that we describe in terms of spectral and spatial characteristics. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：242 / 258

页数：17