NASA tweaks flight path of Mars mission
NASA says a manoeuver Tuesday adjusted the flight path of its Mars Science Laboratory spacecraft for delivering the rover Curiosity to a landing target on Mars.
The car-size, 1-ton rover is set to arrive at Mars Aug. 6 to begin a two-year mission to investigate whether Mars ever offered an environment favourable for microbial life.
The latest trajectory correction manoeuver -- the third and smallest since the spacecraft's November 26, 2011, launch -- used four thruster firings totaling 40 seconds in duration, engineers at NASA's Jet Propulsion Laboratory in Pasadena, Calif., reported.
The maneuver served both to correct errors in the flight path and to carry out a decision to shift the landing target about four miles closer to the martian mountain next to Curiosity's intended landing site.
Shifting the landing target closer to the mountain may shave months off the time needed for driving from the touchdown location to selected destinations at exposures of water-related minerals on the slope of the mountain, scientists said.
"This puts us closer to our entry target, so if any further manoeuvers are needed, I expect them to be small," JPL's Tomas Martin-Mur, the mission's navigation team chief, said.
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