- Press Release
- Dec 5, 2022
NASA Mars Odyssey THEMIS Image: Kaiser Crater DCS
Context image credit: NASA/Mars Orbiter Laser Altimeter (MOLA) Team
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Full data on this image has now been released via the THEMIS Data Releases website.
This image shows two representations of the same infra-red image covering
a portion of Kaiser Crater. On the left is a grayscale image showing
surface temperature, and on the right is a false-color composite made
from 3 individual THEMIS bands. The false-color image is colorized
using a technique called decorrelation stretch (DCS), which emphasizes
the spectral differences between the bands to highlight compositional
In this image, the basaltic sand dunes in bottom of Kaiser crater are colored a bright pink/magenta. The spectral features are clean and prominent on these dust-free surfaces and the dark color of the basaltic dunes helps them to absorb sunlight and produces higher surface temperatures, which also contributes to the image colors.
[Source: ASU THEMIS Science Team]
Note: this THEMIS infrared image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.
Image Credit: NASA/JPL/Arizona State University
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