Curiosity is scheduled to land at approximately 10:31 p.m. PDT Aug. 5 (1:31 a.m. EDT, Aug. 6). Following checkout operations, Curiosity will begin a two-year study of whether the landing vicinity ever offered an environment favorable for microbial life.
Theisinger and other mission leaders described the target adjustment during an update to reporters on Monday, June 11, about preparations for landing and for operating Curiosity on Mars.
A June 2012 revision of the landing target area for Curiosity, the big rover of NASA's Mars Science Laboratory mission, reduces the area's size. It also puts the center of the landing area closer to Mount Sharp, which bears geological layers that are the mission's prime destination. Image Credit: NASA/JPL-Caltech/ESA/DLR/FU Berlin/MSSS
The landing target ellipse had been approximately 20 kilometers wide by 25 kilometers long (12 miles wide and 16 miles long). Continuing analysis of the new landing system’s capabilities has allowed mission planners to shrink the area to approximately 7 by 20 kilometers (4 by 12 miles), assuming winds and other atmospheric conditions are as predicted.
Even with the smaller ellipse, Curiosity will be able to touch down at a safe distance from steep slopes at the edge of Mount Sharp.
“We have been preparing for years for a successful landing by Curiosity, and all signs are good,” said Dave Lavery, Mars Science Laboratory program executive at NASA. “However, landing on Mars always carries risks, so success is not guaranteed. Once on the ground we’ll proceed carefully. We have plenty of time since Curiosity is not as life-limited as the approximate 90-day missions like NASA’s Mars Exploration Rovers and the Phoenix lander.”
Since the spacecraft was launched in November 2011, engineers have continued testing and improving its landing software. Mars Science Laboratory will use an upgraded version of flight software installed on its computers during the past two weeks. Additional upgrades for Mars surface operations will be sent to the rover about a week after landing.
Other preparations include upgrades to the rover’s software and understanding effects of debris coming from the drill the rover will use to collect samples from rocks on Mars. Experiments at JPL indicate that Teflon from the drill could mix with the powdered samples. Testing will continue past landing with copies of the drill. The rover will deliver the samples to onboard instruments that can identify mineral and chemical ingredients.
“The material from the drill could complicate, but will not prevent analysis of carbon content in rocks by one of the rover’s 10 instruments. There are workarounds,” said John Grotzinger, the mission’s project scientist at the California Institute of Technology in Pasadena. “Organic carbon compounds in an environment are one prerequisite for life. We know meteorites deliver non-biological organic carbon to Mars, but not whether it persists near the surface. We will be checking for that and for other chemical and mineral clues about habitability.”