Re: Stardust's Annefrank photos
This problem with the color wheel on Stardust and the problems with color calibration of the visible light images from THEMIS reinforces the idea that getting color images using multiple filters on spacecraft is a bad idea.
Fortunately the upcoming OMEGA imager on Mars Express and HiRise on Mars Reconnaissance Orbiter will be of the type that observes all the detected frequencies simultaneously.
Then we will have color images of Mars of the clarity we have of Earth from satellites:
IKONOS Sample Imagery
http://www.geometricsinc.com/imagery.htm
Bob Clark