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

Research areas:
Year:
2007
Authors:
Journal:
ICARUS
Volume:
186
Number:
1
Pages:
242-258
Month:
January
ISSN:
0019-1035
BibTex:
Abstract:
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.