They used data from the visible and infrared mapping
spectrometer, a device that looks at how various wavelengths of light are reflected by the surface, allowing minerals to be identified.
The visible and infrared mapping
spectrometer was provided by the Italian Space Agency and the Italian National Institute for Astrophysics, was built by Selex ES, and is managed by Italy's National Institute for Astrophysics and Planetology in Rome.
The two instruments are Cassini's Visible and Infrared Mapping
Spectrometer because of which the scientists are given the opportunity to study the islands with the help of two wavelengths.
Sarah Badman, a Cassini visual and infrared mapping
spectrometer team associate at Lancaster University, England, said that scientists have wondered why the high atmospheres of Saturn and other gas giants are heated far beyond what might normally be expected by their distance from the Sun.
The spacecraft, which was launched in 2007, has a gamma ray and neutron detector instrument, which will gather information on cosmic rays during the approach phase, as well as an infrared mapping
Clark, who works with the US geological survey, is part of the team that analysed data from visual and infrared mapping
spectrometer on board Cassini -- which had had a flyby of the moon in 1999 -- as well as M3.
Jessica Sunshine of the University of Maryland and colleagues used infrared mapping
from the Deep Impact spacecraft to show water all over the moon.
Authorities initially said it charred 18,000 acres but infrared mapping
overnight showed the fire was smaller.
Some of the features are large enough for Cassini's visible and infrared mapping
spectrometer to perform a key test in the next year or two, when the sun climbs higher over Titan, says Cassini research Jonathan Lunine of the University of Arizona in Tucson.
Earlier estimates that placed the fire at 4,000 acres were made prior to infrared mapping
and may have included acreage burned in an adjacent spot fire, said Department of Forestry spokeswoman Arlene Whalen.
The last set of images, in the infrared, shows a quiet southern aurora (in green) in observations from Cassini's visual and infrared mapping
spectrometer on May 17.
A black-and-white version of the imaging camera movie and movies obtained by Cassini's visual and infrared mapping
spectrometer also are tools Cassini scientists can use to look at wind speeds and the mini-storms inside the jet stream.