NASA\u2019s long-lived Opportunity Mars rover has gone into a self-imposed standby mode on the Red Planet, the robot\u2019s handlers say.<\/p>\n
Mission controllers for Opportunity, which landed on Mars in January 2004, first learned of the issue on Saturday (April 27). On that day, the rover got back in touch after a nearly three-week communication moratorium caused by an unfavorable planetary alignment called a Mars solar conjunction, in which Mars and Earth are on opposite sides of the sun.<\/p>\n
The Opportunity rover apparently put itself into standby on April 22 after sensing a problem during a routine camera check, mission managers said.<\/p>\n
\u201cOur current suspicion is that Opportunity rebooted its flight software, possibly while the cameras on the mast were imaging the sun,\u201d Opportunity project manager John Callas, of NASA\u2019s Jet Propulsion Laboratory in Pasadena, Calif., explained in a statement Monday (April 29).<\/p>\n
\u201cWe found the rover in a standby state called automode, in which it maintains power balance and communication schedules, but waits for instructions from the ground,\u201d Callas added. \u201cWe crafted our solar conjunction plan to be resilient to this kind of rover reset, if it were to occur.\u201d<\/p>\n
Opportunity\u2019s handlers prepared new commands Monday designed to spur the rover into resuming operations, mission team members said.<\/p>\n
The golf-cart-size Opportunity landed on Mars more than nine years ago along with its twin, Spirit, on a three-month mission to search for signs of past water activity on the Red Planet. The two rovers found plenty of such evidence, and then kept trundling across Mars. Spirit was declared dead in 2010, but Opportunity is still going strong.<\/p>\n