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Curiosity’s Mars Hand Lens Imager (MAHLI) Investigation |
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| Authors: | Kenneth S Edgett R Aileen Yingst Michael A Ravine Michael A Caplinger Justin N Maki F Tony Ghaemi Jacob A Schaffner James F Bell III Laurence J Edwards Kenneth E Herkenhoff Ezat Heydari Linda C Kah Mark T Lemmon Michelle E Minitti Timothy S Olson Timothy J Parker Scott K Rowland Juergen Schieber Robert J Sullivan Dawn Y Sumner Peter C Thomas Elsa H Jensen John J Simmonds Aaron J Sengstacken Reg G Willson Walter Goetz |
| Institution: | 1. Malin Space Science Systems, Inc., P.O. Box 910148, San Diego, CA, 92191, USA 2. Planetary Science Institute, Tucson, AZ, USA 3. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA 4. Ghaemi Optical Engineering, San Diego, CA, USA 5. School of Earth and Space Exploration, Arizona State University, Tempe, AZ, USA 6. NASA Ames Research Center, Moffett Field, CA, USA 7. U.S. Geological Survey, Flagstaff, AZ, USA 8. Jackson State University, Jackson, MS, USA 9. University of Tennessee, Knoxville, TN, USA 10. Texas A&M University, College Station, TX, USA 11. Applied Physics Laboratory, Johns Hopkins University, Laurel, MD, USA 12. Salish Kootenai College, Pablo, MT, USA 13. University of Hawai‘i at Mānoa, Honolulu, HI, USA 14. Indiana University, Bloomington, IN, USA 15. Cornell University, Ithaca, NY, USA 16. University of California, Davis, CA, USA 17. Max-Planck-Institute für Sonnensystemforschung, Katlenburg-Lindau, Germany |
| Abstract: | The Mars Science Laboratory (MSL) Mars Hand Lens Imager (MAHLI) investigation will use a 2-megapixel color camera with a focusable macro lens aboard the rover, Curiosity, to investigate the stratigraphy and grain-scale texture, structure, mineralogy, and morphology of geologic materials in northwestern Gale crater. Of particular interest is the stratigraphic record of a ～5?km thick layered rock sequence exposed on the slopes of Aeolis Mons (also known as Mount Sharp). The instrument consists of three parts, a?camera head mounted on the turret at the end of a robotic arm, an electronics and data storage assembly located inside the rover body, and a calibration target mounted on the robotic arm shoulder azimuth actuator housing. MAHLI can acquire in-focus images at working distances from ～2.1?cm to infinity. At the minimum working distance, image pixel scale is ～14?μm per pixel and very coarse silt grains can be resolved. At the working distance of the Mars Exploration Rover Microscopic Imager cameras aboard Spirit and Opportunity, MAHLI’s resolution is comparable at ～30?μm per pixel. Onboard capabilities include autofocus, auto-exposure, sub-framing, video imaging, Bayer pattern color interpolation, lossy and lossless compression, focus merging of up to 8 focus stack images, white light and longwave ultraviolet (365 nm) illumination of nearby subjects, and 8 gigabytes of non-volatile memory data storage. |
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