Searching for Active Dust Devils in Gusev Crater from Orbit by Mars Express and the Ground from Spirit

Details Searching for Active Dust Devils in Gusev Crater from Orbit by Mars Express and the Ground from Spirit Searching for Active Dust Devils in Gusev Crater from Orbit by Mars Express and the Ground from Spirit

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufm.p31b0983w&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #P31B-0983

Physics

5409 Atmospheres: Structure And Dynamics, 5415 Erosion And Weathering, 5464 Remote Sensing, 6225 Mars

Scientific paper

Prior to the landing of the Mars Exploration Rover, Spirit, orbital data revealed numerous low albedo features in the Gusev crater landing ellipse attributed to the passage of dust devils (DD), and it was anticipated that active DD would be seen during Spirit operations. Spirit landed on a linear dark feature considered to be a DD track. Mars Express images taken after the landing were compared to images taken just before the landing; results show that many of the dark DD tracks in the area had faded over one martian year (inferred to be the result of dust settling on the surface) and that new tracks had formed in areas north and west of the final Spirit landing site. The three camera systems on Spirit (Pancam, Hazcam, Navcam) were used to search for active DD in a campaign similar to that used successfully during the Mars Pathfinder mission. However, thus far no active DD have been seen from the surface. We attribute this result to one or more of the following: 1) no DD formed within sight of Spirit, 2) observations were not taken at the time or place of DD activity, 3) camera filters/compression values were insufficient to image active DD, or 4) current image processing techniques are inadequate for detecting active DD. As Spirit continues operations, additional searches will be made when resources allow.

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