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Curiosity's Landscape Portrait in Context
This picture of the Martian landing site of NASA's Curiosity rover puts a color view obtained by the rover in the context of a computer simulation derived from images acquired from orbiting spacecraft. The view looks north, showing a distant ridge that is the north wall and rim of Gale Crater.
The color image was obtained by Curiosity's Mars Hand Lens Imager (MAHLI) on Aug. 6 PDT (Aug. 7 UTC), the first Martian day after Curiosity's landing on Aug. 5 PDT (Aug. 6 UTC). It has been rendered about 10 percent transparent so that scientists can see how it matches the simulated terrain in the background. The MAHLI image was taken while the camera's transparent dust cover was still on. Curiosity's descent coated the cover with a thin film of dust.
The computer simulation is a digital elevation model that incorporates data from the High Resolution Imaging Science Experiment (HiRISE) and Context Camera on NASA's Mars Reconnaissance Orbiter and the High Resolution Stereo Camera on ESA's Mars Express.
The peak seen on the left-side of the MAHLI image is about 15 miles (24 kilometers) distant with a height of about 3,775 feet (1,150 meters) high. The box with arrows at the upper left indicates direction. The arrow pointing up is "up" with respect to the gravity of Mars. The arrow pointing to the right is east. North would be an arrow pointing into the image (that is, the MAHLI view is toward the north).
The MAHLI is located on the turret at the end of Curiosity's robotic arm. At the time the MAHLI image was acquired, the robotic arm was in its stowed position. It has been stowed since the rover was packaged for its Nov. 26, 2011, launch.
When the robotic arm, turret and MAHLI are stowed, the MAHLI is in a position that is rotated 30 degrees relative to the rover deck. The MAHLI image shown here has been rotated to correct for that tilt, so that the sky is "up" and the ground is "down." Here, MAHLI is looking out from the front left side of the rover. This is much like the view from the driver's side of cars sold in the U.S.
The main purpose of Curiosity's MAHLI camera is to acquire close-up, high-resolution views of rocks and soil at the rover's Gale Crater field site. The camera is capable of focusing on any target at distances of about 0.8 inch (2.1 centimeters) to infinity. This means it can, as shown here, also obtain pictures of the Martian landscape. This was the first time the MAHLI focus mechanism was operated since before launch and it performed flawlessly.
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Scene of a Martian Landing
The four main pieces of hardware that arrived on Mars with NASA's Curiosity rover were spotted by NASA's Mars Reconnaissance Orbiter (MRO). The High-Resolution Imaging Science Experiment (HiRISE) camera captured this image about 24 hours after landing. The large, reduced-scale image points out the strewn hardware: the heat shield was the first piece to hit the ground, followed by the back shell attached to the parachute, then the rover itself touched down, and finally, after cables were cut, the sky crane flew away to the northwest and crashed. Relatively dark areas in all four spots are from disturbances of the bright dust on Mars, revealing the darker material below the surface dust.
Around the rover, this disturbance was from the sky crane thrusters, and forms a bilaterally symmetrical pattern. The darkened radial jets from the sky crane are downrange from the point of oblique impact, much like the oblique impacts of asteroids. In fact, they make an arrow pointing to Curiosity.
This image was acquired from a special 41-degree roll of MRO, larger than the normal 30-degree limit. It rolled towards the west and towards the sun, which increases visible scattering by atmospheric dust as well as the amount of atmosphere the orbiter has to look through, thereby reducing the contrast of surface features. Future images will show the hardware in greater detail. Our view is tilted about 45 degrees from the surface (more than the 41-degree roll due to planetary curvature), like a view out of an airplane window. Tilt the images 90 degrees clockwise to see the surface better from this perspective. The views are primarily of the shadowed side of the rover and other objects.
The image scale is 39 centimeters (15.3 inches) per pixel.
HiRISE is one of six instruments on NASA's Mars Reconnaissance Orbiter. The University of Arizona, Tucson, operates the orbiter's HiRISE camera, which was built by Ball Aerospace & Technologies Corp., Boulder, Colo. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, built the spacecraft.
Image credit: NASA/JPL-Caltech/Univ. of Arizona
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Fotos: NASA