Mars rover Curiosity beams back images showing its descentAugust 7th, 2012 in Astronomy & Space / Space Exploration
This color thumbnail image was obtained by NASA's Curiosity rover during its descent to the surface of Mars on Aug. 5 PDT (Aug. 6 EDT). The image was obtained by the Mars Descent Imager instrument known as MARDI and shows the 15-foot (4.5-meter) diameter heat shield when it was about 50 feet (16 meters) from the spacecraft. It was obtained two and one-half minutes before touching down on the surface of Mars and about three seconds after heat shield separation. It is among the first color images Curiosity sent back from Mars. The resolution of all of the MARDI frames is reduced by a factor of eight in order for them to be promptly received on Earth during this early phase of the mission. Full resolution (1,600 by 1,200 pixel) images will be returned to Earth over the next several months as Curiosity begins its scientific exploration of Mars. The original image from MARDI has been geometrically corrected to look flat. Image credit: NASA/JPL-Caltech/MSSS
(Phys.org) -- Earlier today, just hours after NASA's Curiosity rover landed on Mars, a select group of images taken by the onboard Mars Descent Imager, or MARDI, were beamed back to Earth. The 297 color, low-resolution images, provide a glimpse of the rover's descent into Gale Crater. They are a preview of the approximately 1,504 images of descent currently held in the rover's onboard memory. When put together in highest resolution, the resulting video is expected to depict the rover's descent from the moment the entry system's heat shield is released through touchdown.
"The image sequence received so far indicates Curiosity had, as expected, a very exciting ride to the surface," said Mike Malin, imaging scientist for the Mars Science Lab mission from Malin Space Systems in San Diego. "But as dramatic as they are, there is real other-world importance to obtaining them. These images will help the mission scientists interpret the rover's surroundings, the rover drivers in planning for future drives across the surface, as well as assist engineers in their design of forthcoming landing systems for Mars or other worlds."
Video: This stop-motion video shows 297 frames from the Mars Descent Imager aboard NASA's Curiosity rover as it descended to the surface of Mars. These thumbnail images were received on Earth on Aug. 6, 2012, and cover the last two and a half minutes of descent. Credit: NASA/JPL-Caltech
The MARDI camera is located on the chassis of the Curiosity rover. Just before the heat shield fell away, MARDI began its imaging task. The images selected for early downlink to Earth were taken at different points in Curiosity's final descent toward the surface. One of the earliest images shows the entry vehicle's heat shield 50 feet (15 meters) and falling away after separating from the vehicle three seconds before. A set of images demonstrates some of the gyrations Curiosity went through while on the parachute. Another remarkable set of images depicts the final moments leading up to landing, where the exhaust from four of the descent stage's 742 pounds of thrust rockets billow up dust from the Martian surface.
"A good comparison is to that grainy onboard film from Apollo 11 when they were about to land on the moon," said Malin.
Those MARDI images downlinked so far are low-resolution thumbnails, 192 by 144 pixels. In the months ahead, as communications between rover and Earth become more robust, full-frame images 1,600 by 1,200 pixels in size, are expected to provide the most complete and dramatic imagery of a planetary landing in the history of exploration.
The mission also released a higher-resolution Hazcam image of their target, the mountain in the middle of Gale Crater informally titled Mount Sharp.
Curiosity, NASA's latest contribution to the Martian landscape, landed at 10:32 p.m. Aug. 5, PDT, (05:32 on Aug. 6, EDT) near the foot of a mountain three miles tall inside Gale Crater, 96 miles in diameter.
The mission is managed by JPL for NASA's Science Mission Directorate in Washington. The rover was designed, developed and assembled at JPL. Malin Space Science Systems, San Diego, provided MARDI, as well as three other cameras on Curiosity.
Provided by JPL/NASA
"Mars rover Curiosity beams back images showing its descent." August 7th, 2012. http://phys.org/news/2012-08-mars-rover-curiosity-images-descent.html