NASA | JPL-Caltech | MSL Curiosity | 2017 Nov 01
[img3="This pair of images from Curiosity's Mastcam illustrates how special filtersColor-discerning capabilities that NASA's Curiosity rover has been using on Mars since 2012 are proving particularly helpful on a mountainside ridge the rover is now climbing.
are used to scout terrain ahead for variations in the local bedrock.
Credits: NASA/JPL-Caltech/MSSS/ASU"]https://www.jpl.nasa.gov/spaceimages/im ... _hires.jpg[/img3][hr][/hr]
These capabilities go beyond the thousands of full-color images Curiosity takes every year: The rover can look at Mars with special filters helpful for identifying some minerals, and also with a spectrometer that sorts light into thousands of wavelengths, extending beyond visible-light colors into infrared and ultraviolet. These observations aid decisions about where to drive and investigations of chosen targets.
One of these methods for discerning targets' colors uses the Mast Camera (Mastcam); the other uses the Chemistry and Camera instrument (ChemCam).
Each of the Mastcam's two eyes -- one telephoto and one wider angle -- has several science filters that can be changed from one image to the next to assess how brightly a rock reflects light of specific colors. By design, some of the filters are for diagnostic wavelengths that certain minerals absorb, rather than reflect. ...
